mb/facebook/monolith: Update GT-Sliced icc_max

Update the icc_max for the GT-Sliced VR domain according to the
hardware design.

BUG=N/A
TEST=build

Change-Id: Ib9f7d77d144a282214e6bda8a4e836873c395487
Signed-off-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39804
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/facebook/monolith/devicetree.cb b/src/mainboard/facebook/monolith/devicetree.cb
index e65fe3c..45829aa 100644
--- a/src/mainboard/facebook/monolith/devicetree.cb
+++ b/src/mainboard/facebook/monolith/devicetree.cb
@@ -95,7 +95,7 @@
 	#| Psi4Enable     | 1     | 1     | 1     | 1     |
 	#| ImonSlope      | 0     | 0     | 0     | 0     |
 	#| ImonOffset     | 0     | 0     | 0     | 0     |
-	#| IccMax         | 5.1A  | 32A   | 35A   | 35A   |
+	#| IccMax         | 5.1A  | 32A   | 35A   | 31A   |
 	#| VrVoltageLimit | 1.52V | 1.52V | 1.52V | 1.52V |
 	#+----------------+-------+-------+-------+-------+
 	register "domain_vr_config[VR_SYSTEM_AGENT]" = "{
@@ -146,7 +146,7 @@
 		.psi4enable = 1, \
 		.imon_slope = 0, \
 		.imon_offset = 0, \
-		.icc_max = VR_CFG_AMP(35), \
+		.icc_max = VR_CFG_AMP(31), \
 		.voltage_limit = 1520 \
 	}"