mb/google/guybrush: Enable STT in device tree

Enable Skin Temperature Tracking with initial configuration settings.

BUG=b:190732595
TEST=Confirm that AGT tool can successfully complete data collection

Change-Id: I37b5da1b56586ef75ad17f6766cd00ddac87aa5a
Signed-off-by: Jason Glenesk <jason.glenesk@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55434
Reviewed-by: Rob Barnes <robbarnes@google.com>
Reviewed-by: Matt Papageorge <matthewpapa07@gmail.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb b/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
index 59efa43..df8bd2a 100644
--- a/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
@@ -48,6 +48,28 @@
 	# Enable S0i3 support
 	register "s0ix_enable" = "1"
 
+	# Enable STT support
+	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_m3" = "0"
+	register "stt_m4" = "0"
+	register "stt_m5" = "0"
+	register "stt_m6" = "0"
+	register "stt_c_apu" = "0xE99F"
+	register "stt_c_gpu" = "0"
+	register "stt_c_hs2" = "0"
+	register "stt_alpha_apu" = "0xCCD"
+	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 "system_configuration" = "2"
 
 	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL |