soc/amd/cezanne: Remove set_resets_to_cold

Renoir actually supports warm reset, so we don't need to toggle the
PwrGood for all resets.

Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: I45d6b559874d67b886c65f7ad722f96eba415399
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90211
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/cezanne/Kconfig

@@ -100,6 +100,7 @@ config SOC_AMD_CEZANNE
 config SOC_AMD_RENOIR
 	bool
 	select SOC_AMD_CEZANNE_BASE
+	select SOC_AMD_SUPPORTS_WARM_RESET
 	select SOC_AMD_COMMON_BLOCK_CPU_SYNC_PSP_ADDR_MSR
 	help
 		AMD Renoir support

src/soc/amd/cezanne/fch.c

@@ -173,7 +173,9 @@ static void cgpll_clock_gate_init(void)
 
 void fch_init(void *chip_info)
 {
-	set_resets_to_cold();
+	if (!CONFIG(SOC_AMD_RENOIR))
+		set_resets_to_cold();
+
 	i2c_soc_init();
 	fch_init_acpi_ports();