mb/google/brya: Enable SKIP_RAM_ID_STRAPS for TRULO variant

This change enables SKIP_RAM_ID_STRAPS for the TRULO board variant as
this board design won't stuff MEM strap GPIO hence, sets the static
SPD ID to 0 for the MT62F512M32D2DR-031 DRAM part.

BUG=b:351976770
TEST=Able to build google/trulo.

Change-Id: I1acb4680a143611c55f4fa6e032fde38c62af054
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83543
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Dinesh Gehlot <digehlot@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>

src/mainboard/google/brya/Kconfig

@@ -550,6 +550,7 @@ config BOARD_GOOGLE_TIVVIKS
 
 config BOARD_GOOGLE_TRULO
 	select BOARD_GOOGLE_BASEBOARD_TRULO
+	select SKIP_RAM_ID_STRAPS
 	select SOC_INTEL_TWINLAKE
 	select SOC_INTEL_COMMON_BLOCK_HDA_VERB
 	select SOC_INTEL_TCSS_USE_PDC_PMC_USBC_MUX_CONFIGURATION
@@ -1000,4 +1001,16 @@ config PCIEXP_DEFAULT_MAX_RESIZABLE_BAR_BITS
 	int
 	default 33
 
+config SKIP_RAM_ID_STRAPS
+	bool
+	default n
+	help
+	  Enable this option if the board variant does not rely on MEM Strap GPIOs to determine the SPD ID.
+
+	  This is typically the case when the DRAM part is fixed (only one type is used).
+	  In such board designs, enabling this option will bypass the reading of MEM Strap GPIOs
+	  and instead use a static SPD ID number.
+
+	  If unsure, leave this option disabled.
+
 endif # BOARD_GOOGLE_BRYA_COMMON

src/mainboard/google/brya/variants/trulo/memory.c

@@ -76,6 +76,9 @@ const struct mb_cfg *variant_memory_params(void)
 
 int variant_memory_sku(void)
 {
+	if (CONFIG(SKIP_RAM_ID_STRAPS))
+		return 0; /* SPD ID: 0 - MT62F512M32D2DR-031 WT:B */
+
 	/*
 	 * Memory configuration board straps
 	 * GPIO_MEM_CONFIG_0	GPP_E2