soc/amd: Remove unsupported DPTC tablet mode settings
The following boards are setting DTPC tablet mode values without
corresponding device tree values, meaning they are effectively setting
"random" values for tablet mode:
1. Cezanne
2. Mendocino
The device tree has tablet mode disabled, so the code should never be
exercised, but this CL removes it entirely to cleanup "dead" code.
BRANCH=none
BUG=b:
217911928
TEST=Build nipperkin
TEST=Boot skyrim
Signed-off-by: Tim Van Patten <timvp@google.com>
Change-Id: Ide96f255b69670d1b4c37ca2f94cc3504a958b57
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67181
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>