mb/google/volteer: set tcc_offset value to 10

Set tcc_offset value to 10 in devicetree for Thermal Control
Circuit (TCC) activation feature.

BUG=None
BRANCH=None
TEST=Built for volteer platform and verified the MSR value

Change-Id: I6438547e09a3ff3a1c01addfcc01383e89f5b435
Signed-off-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42902
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/mainboard/google/volteer/variants/baseboard/devicetree.cb

@@ -222,6 +222,8 @@ chip soc/intel/tigerlake
 
 	register "Device4Enable" = "1"
 
+	register "tcc_offset" = "10"     # TCC of 90
+
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |