mb/google/kahlee/variants/baseboard: Set STAPM percentage
Default STAPM percentage causes a lot of thermal throttling on grunt.
AMD experimented with 80%, it works for grunt. This is initial code to
provide easy change path for other grunt based platforms.
BUG=b:
111608748
TEST=build and boot grunt.
Change-Id: I22863f6ed76152bf872fce3e275f8a7fd8077504
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/28564
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>