kevin: gru: Don't disable trackpad in tablet mode.
kevin: gru: Don't disable trackpad in tablet mode.

Apparently, one does not simply remove power from the trackpad and
restore it at will; the kernel needs to be involved and decide if the
device needs to be fully reinitialized, or if it was supposed to keep
some state.  Therefore, let's not touch it except from startup and
shutdown and let the higher parts of the stack make the necessary
decisions.

BUG=chrome-os-partner:60478
BRANCH=gru
TEST=Boot in tablet mode and verify trackpad still works.
TEST=Go from clamshell to tablet mode and verify trackpad still works in
both modes.

Change-Id: I7674c5516ce4d237b0d2a15fb94b47e6fbe3ba39
Signed-off-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@google.com>
Reviewed-on: https://chromium-review.googlesource.com/417110
Commit-Ready: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Tested-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec