Add various methods support for pch device under dptf driver.
This provides support of different control knobs for FIVR.
BUG=b:198582766
BRANCH=None
TEST=Build FW and test on brya0 board
Change-Id: I2d40fff98cb4eb9144d55fd5383d9946e4cb0558
Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57925
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
e0bff814da