mb/google/guybrush: Update STT coefficients

Update guybrush STT (Skin Temperature Tracking) configuration settings
to values provided by power team after tuning.

BUG=b:203123658

Change-Id: I14c69dbe044e4f3f2711be96e5ea80db0686b3eb
Signed-off-by: Jason Glenesk <jason.glenesk@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58674
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Rob Barnes <robbarnes@google.com>
diff --git a/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb b/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
index 8a9543d..7fb3c7e 100644
--- a/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
@@ -52,23 +52,23 @@
 	register "stt_control" = "1"
 	register "stt_pcb_sensor_count" = "2"
 	register "stt_min_limit" = "0"
-	register "stt_m1" = "0x0319"
-	register "stt_m2" = "0x01A0"
+	register "stt_m1" = "0x03A0"
+	register "stt_m2" = "0xFFC9"
 	register "stt_m3" = "0"
 	register "stt_m4" = "0"
 	register "stt_m5" = "0"
 	register "stt_m6" = "0"
-	register "stt_c_apu" = "0xE99F"
+	register "stt_c_apu" = "0x0901"
 	register "stt_c_gpu" = "0"
 	register "stt_c_hs2" = "0"
-	register "stt_alpha_apu" = "0xCCD"
+	register "stt_alpha_apu" = "0x199A"
 	register "stt_alpha_gpu" = "0"
 	register "stt_alpha_hs2" = "0"
 	register "stt_skin_temp_apu" = "0x2D00"
 	register "stt_skin_temp_gpu" = "0"
 	register "stt_skin_temp_hs2" = "0"
-	register "stt_error_coeff" = "0xD"
-	register "stt_error_rate_coefficient" = "0x8F6"
+	register "stt_error_coeff" = "0x21"
+	register "stt_error_rate_coefficient" = "0xCCD"
 
 	register "system_configuration" = "2"