wtm2/samus: fix coreboot compilation error with tpmp removed

wtm2/samus: fix coreboot compilation error with tpmp removed

Since CL:226662, all TPMP accessing should be removed as well,
else it will cause wtm2 coreboot failed on build.

BUG=none
BRANCH=none
TEST=./setup_board --board=fox_wtm2 && emerge-fox_wtm2 coreboot
CQ-DEPEND=CL:226662

Change-Id: Ib25f2d32997ef82b0ebf049803f2c5002a0a3abf
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: c99456bf42544518e2a36b6e0bbfe7f4ee1b4aff
Original-Change-Id: Ia0eebb1924bbb23979c880f7d05600a0cf1e4ca3
Original-Signed-off-by: Harry Pan <harry.pan@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/232165
Original-Reviewed-by: Wei Shun Chang <wei.shun.chang@intel.com>
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/9477
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>