soc/intel/pantherlake: Comply with the no typedef coding style rule

As https://doc.coreboot.org/contributing/coding_style.html#typedefs
states: "In general, a pointer, or a struct that has elements that can
reasonably be directly accessed should never be a typedef". This
commit makes the Intel Panther Lake SoC code comply with this by using
explicitly `struct soc_intel_pantherlake_config' in the
soc/intel/pantherlake code as I have been suggested to for the
`fsp_params.c' files. The rule being the rule and consistency across
a project matters more than personal preferences.

The documentation lists five exceptions and none on them cover the use
of `config_t' instead `struct soc_intel_pantherlake' but I believe it
does not make the code better for the following three reasons:

1. It is repetitive, make the line longer and the code is in
   soc/intel/pantherlake so obviously the config_t data structure is
   the pantherlake soc configuration.

2. It makes re-usability from one generation to another unnecessarily
   harder.

3. This config_t abstraction is required for and used by some common
   block code anyway. Hence, we end-up with some code using `config_t'
   and other using the final structure which break the consistency of
   the code when the project in looked as a whole.

BUG=348678529
TEST=Google fatcat mainboard compiles

Change-Id: Ibe382615db1a7c7a0841d8fe4ae43c226e2c2021
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84561
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Ronak Kanabar <ronak.kanabar@intel.com>

src/soc/intel/pantherlake/acpi.c

@@ -126,7 +126,7 @@ const acpi_cstate_t *soc_get_cstate_map(size_t *entries)
 	if (c_state_initialized)
 		return map;
 
-	config_t *config = config_of_soc();
+	const struct soc_intel_pantherlake_config *config = config_of_soc();
 	if (config == NULL) {
 		printk(BIOS_ERR, "Error: Configuration could not be retrieved.\n");
 		return NULL;
@@ -152,7 +152,7 @@ const acpi_cstate_t *soc_get_cstate_map(size_t *entries)
 
 void soc_power_states_generation(int core_id, int cores_per_package)
 {
-	config_t *config = config_of_soc();
+	const struct soc_intel_pantherlake_config *config = config_of_soc();
 	if (config == NULL) {
 		printk(BIOS_ERR, "Error: Configuration could not be retrieved.\n");
 		return;
@@ -166,7 +166,7 @@ void soc_fill_fadt(acpi_fadt_t *fadt)
 {
 	const uint16_t pmbase = ACPI_BASE_ADDRESS;
 
-	config_t *config = config_of_soc();
+	const struct soc_intel_pantherlake_config *config = config_of_soc();
 	if (config == NULL) {
 		printk(BIOS_ERR, "Error: Configuration could not be retrieved.\n");
 		return;
@@ -339,7 +339,7 @@ unsigned long sa_write_acpi_tables(const struct device *dev, unsigned long curre
 
 void soc_fill_gnvs(struct global_nvs *gnvs)
 {
-	config_t *config = config_of_soc();
+	const struct soc_intel_pantherlake_config *config = config_of_soc();
 	if (config == NULL) {
 		printk(BIOS_ERR, "Configuration could not be retrieved.\n");
 		return;

src/soc/intel/pantherlake/chip.c

@@ -139,7 +139,7 @@ bool soc_is_ish_partition_enabled(void)
 static void soc_fill_gpio_pm_configuration(void)
 {
 	uint8_t value[TOTAL_GPIO_COMM];
-	const config_t *config = config_of_soc();
+	const struct soc_intel_pantherlake_config *config = config_of_soc();
 
 	if (config->gpio_override_pm)
 		memcpy(value, config->gpio_pm, sizeof(value));
@@ -163,7 +163,7 @@ static void soc_enable_tracehub(void)
 
 void soc_init_pre_device(void *chip_info)
 {
-	config_t *config = config_of_soc();
+	struct soc_intel_pantherlake_config *config = config_of_soc();
 	if (config == NULL) {
 		printk(BIOS_ERR, "Error: Configuration could not be retrieved.\n");
 		return;

src/soc/intel/pantherlake/cpu.c

@@ -53,7 +53,7 @@ static void configure_misc(void)
 {
 	msr_t msr;
 
-	config_t *conf = (config_t *)config_of_soc();
+	const struct soc_intel_pantherlake_config *conf = config_of_soc();
 
 	msr = rdmsr(IA32_MISC_ENABLE);
 	msr.lo |= FAST_STRINGS_ENABLE_BIT;
@@ -123,7 +123,7 @@ void soc_core_init(struct device *cpu)
 	/* Set energy policy */
 	set_energy_perf_bias(ENERGY_POLICY_NORMAL);
 
-	const config_t *conf = config_of_soc();
+	const struct soc_intel_pantherlake_config *conf = config_of_soc();
 	/* Set energy-performance preference */
 	if (conf != NULL && conf->enable_energy_perf_pref) {
 		if (check_energy_perf_cap())
@@ -152,7 +152,7 @@ static void pre_mp_init(void)
 {
 	soc_fsp_load();
 
-	const config_t *conf = config_of_soc();
+	const struct soc_intel_pantherlake_config *conf = config_of_soc();
 	if (conf == NULL) {
 		printk(BIOS_ERR, "Configuration could not be retrieved.\n");
 		return;

src/soc/intel/pantherlake/espi.c

@@ -16,7 +16,7 @@
 
 void soc_get_gen_io_dec_range(uint32_t gen_io_dec[LPC_NUM_GENERIC_IO_RANGES])
 {
-	const config_t *config = config_of_soc();
+	const struct soc_intel_pantherlake_config *config = config_of_soc();
 
 	gen_io_dec[0] = config->gen1_dec;
 	gen_io_dec[1] = config->gen2_dec;

src/soc/intel/pantherlake/pmc.c

@@ -66,7 +66,7 @@ static void config_deep_sx(uint32_t deepsx_config)
 
 static void soc_pmc_enable(struct device *dev)
 {
-	const config_t *config = config_of_soc();
+	const struct soc_intel_pantherlake_config *config = config_of_soc();
 
 	rtc_init();
 

src/soc/intel/pantherlake/systemagent.c

@@ -144,7 +144,7 @@ static void configure_tdp(struct device *dev)
 	u8 tdp;
 	size_t i;
 	bool config_tdp = false;
-	config_t *config;
+	struct soc_intel_pantherlake_config *config;
 
 	config = config_of_soc();