mb/google/brya/var/banshee: Update VR domain settings

Update the VR domain settings based on the request of internal team.

- IA ac_loadline from 2.3mOhms to 2.4mOhms.
- IA dc_loadline from 2.3mOhms to 2.28mOhms.
- GT ac_loadline from 3.2mOhms to 3.13mOhms.
- GT dc_loadline from 3.2mOhms to 2.94mOhms.

BUG=b:237044562
BRANCH=firmware-brya-14505.B
TEST=FW_NAME=banshee emerge-brya coreboot chromeos-bootimage

Signed-off-by: Frank Wu <frank_wu@compal.corp-partner.google.com>
Change-Id: I665665ab8e3bcd6d4643f8b954b86fad3ef78ccd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65522
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: John Su <john_su@compal.corp-partner.google.com>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>

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

@@ -38,6 +38,25 @@ chip soc/intel/alderlake
 		.vnn_sx_voltage_mv = 1250,
 	}"
 
+	# VR Settings
+	register "domain_vr_config[VR_DOMAIN_IA]" = "{
+		.vr_config_enable = 1,
+		.icc_max = 340,
+		.tdc_timewindow = 28000,
+		.tdc_currentlimit = 256,
+		.ac_loadline = 240,
+		.dc_loadline = 228,
+	}"
+
+	register "domain_vr_config[VR_DOMAIN_GT]" = "{
+		.vr_config_enable = 1,
+		.icc_max = 220,
+		.tdc_timewindow = 28000,
+		.tdc_currentlimit = 256,
+		.ac_loadline = 313,
+		.dc_loadline = 294,
+	}"
+
 	register "usb2_ports[3]" = "USB2_PORT_EMPTY"    # Disable Port 3
 	register "usb2_ports[4]" = "USB2_PORT_EMPTY"    # Disable Port 4
 	register "usb2_ports[6]" = "USB2_PORT_EMPTY"    # Disable Port 6