mb/google/poppy/variants/nami: Use GPP_B4 as Touchscreen Power Enable

Touchscreen power enable for Nami has moved from GBB_C22 to GPP_B4 in
the latest schematics.

BUG=b:74347464
BRANCH=None
TEST=./util/abuild/abuild -p none -t google/poppy -x -a

Change-Id: I3b1794d44f25c0d42d082d63b9e3ec3dfcef7528
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://review.coreboot.org/25154
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed