soc/intel/alderlake: Hook up CsPiStartHighinEct UPD

This commit provides option for board to set CsPiStartHighinEct
FSP UPD using a new cs_pi_start_high_in_ect mb_cfg field.

BUG=b:279835630
BRANCH=none
TEST=CsPiStartHighinEct UPD is set properly

Change-Id: I7d0d5f3c782e29fb047ea421e1a5fdfc30bcc26d
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76354
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

src/soc/intel/alderlake/include/soc/meminit.h

@@ -107,6 +107,10 @@ struct mb_cfg {
 
 	/* Enable/Disable TxDqDqs Retraining for Lp4/Lp5/DDR */
 	uint8_t LpDdrDqDqsReTraining;
+
+	/* Enable/Disable Cs Pi Start with High value in Ect */
+	uint8_t cs_pi_start_high_in_ect;
+
 };
 
 void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg,

src/soc/intel/alderlake/meminit.c

@@ -240,6 +240,9 @@ void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg,
 	bool dq_dqs_auto_detect = false;
 	FSP_M_CONFIG *mem_cfg = &memupd->FspmConfig;
 
+#if CONFIG(SOC_INTEL_RAPTORLAKE)
+	mem_cfg->CsPiStartHighinEct = mb_cfg->cs_pi_start_high_in_ect;
+#endif
 	mem_cfg->ECT = mb_cfg->ect;
 	mem_cfg->UserBd = mb_cfg->UserBd;
 	set_rcomp_config(mem_cfg, mb_cfg);