soc/intel/pantherlake: Use common SPI device function driver

Switch to the common SPI device function driver implementation. This
eliminates platform-specific SPI code by leveraging the common driver
with platform-specific Kconfig and macros.

This commit:
- Selects SOC_INTEL_COMMON_FEATURE_SPI_DEVFN and
  SOC_INTEL_COMMON_FEATURE_SPI_DEVFN_PSF in Kconfig
- Adds CONFIG_SOC_INTEL_SPI_DEV_MAX=3
- Adds CONFIG_SOC_INTEL_SPI_PSF_DESTINATION_ID=0x5140
- Removes src/soc/intel/pantherlake/spi.c
- Updates Makefile.mk to remove spi.c compilation

The common code uses SOC_GSPI_DEVFN(n) macro directly.

TEST=Panther Lake Fatcat OS boots properly

Change-Id: Id7462deeb80c1efe32accf0ab7fc9fa68494ddfd
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/91328
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/pantherlake/Kconfig

@@ -98,6 +98,8 @@ config SOC_INTEL_PANTHERLAKE_BASE
 	select SOC_INTEL_COMMON_BLOCK_XHCI_ELOG
 	select SOC_INTEL_COMMON_FEATURE
 	select SOC_INTEL_COMMON_FEATURE_GSPI_DEVFN
+	select SOC_INTEL_COMMON_FEATURE_SPI_DEVFN
+	select SOC_INTEL_COMMON_FEATURE_SPI_DEVFN_PSF
 	select SOC_INTEL_COMMON_FEATURE_I2C_DEVFN
 	select SOC_INTEL_COMMON_FEATURE_UART_DEVICES
 	select SOC_INTEL_COMMON_FSP_RESET
@@ -479,4 +481,12 @@ config RAMSTAGE_CBFS_CACHE_SIZE
 config CBFS_CACHE_ALIGN
 	default 1024
 
+config SOC_INTEL_SPI_DEV_MAX
+	int
+	default 3
+
+config SOC_INTEL_SPI_PSF_DESTINATION_ID
+	hex
+	default 0x5140
+
 endif

src/soc/intel/pantherlake/Makefile.mk

@@ -8,7 +8,6 @@ subdirs-y += ../../../cpu/intel/turbo
 
 # all (bootblock, verstage, romstage, postcar, ramstage)
 all-y += pmutil.c
-all-y += spi.c
 all-y += gpio.c
 
 bootblock-y += bootblock/bootblock.c

src/soc/intel/pantherlake/spi.c

@@ -1,25 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-
-#include <intelblocks/fast_spi.h>
-#include <intelblocks/spi.h>
-#include <soc/pci_devs.h>
-
-#define PSF_SPI_DESTINATION_ID  0x5140
-
-int spi_soc_devfn_to_bus(unsigned int devfn)
-{
-	switch (devfn) {
-	case PCI_DEVFN_GSPI0:
-		return 1;
-	case PCI_DEVFN_GSPI1:
-		return 2;
-	case PCI_DEVFN_GSPI2:
-		return 3;
-	}
-	return -1;
-}
-
-uint32_t soc_get_spi_psf_destination_id(void)
-{
-	return PSF_SPI_DESTINATION_ID;
-}