mb/google/nissa/var/craaskov: Configure the external V1p05/Vnn/VnnSx

This patch configures external V1p05/Vnn/VnnSx rails for Craaskov
to follow best practices for power savings – untested though.

* Enable the external V1p05, Vnn, VnnSx rails in S0i1, S0i2, S0i3, S3,
  S4, S5 , S0 states.
* Set the supported voltage states.
* Set the voltage for v1p05 and vnn.
* Set the ICC max for v1p05 and vnn.

BUG=b:290165011
BRANCH=firmware-nissa-15217.B
TEST=emerge-nissa coreboot

Change-Id: Ibaf6a285788e26688d3d42691ab40052ef6d6cdb
Signed-off-by: Rex Chou <rex_chou@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76926
Reviewed-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brya/variants/craaskov/overridetree.cb

@@ -8,6 +8,21 @@ chip soc/intel/alderlake
 
 	register "typec_aux_bias_pads[0]" = "{.pad_auxp_dc = GPP_E22, .pad_auxn_dc = GPP_E23}"
 
+	# Configure external V1P05/Vnn/VnnSx Rails
+	register "ext_fivr_settings" = "{
+		.configure_ext_fivr = 1,
+		.v1p05_enable_bitmap = FIVR_ENABLE_ALL_SX & ~FIVR_ENABLE_S0,
+		.vnn_enable_bitmap = FIVR_ENABLE_ALL_SX,
+		.vnn_sx_enable_bitmap = FIVR_ENABLE_ALL_SX,
+		.v1p05_supported_voltage_bitmap = FIVR_VOLTAGE_NORMAL,
+		.vnn_supported_voltage_bitmap = FIVR_VOLTAGE_MIN_ACTIVE,
+		.v1p05_voltage_mv = 1050,
+		.vnn_voltage_mv = 780,
+		.vnn_sx_voltage_mv = 1050,
+		.v1p05_icc_max_ma = 500,
+		.vnn_icc_max_ma = 500,
+	}"
+
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |