CHROMIUM: Input: atmel_mxt_ts : Set power/wakeup to disabled by default.

CHROMIUM: Input: atmel_mxt_ts : Set power/wakeup to disabled by default.

Userspace will change it to enabled if needed.

Signed-off-by: Benson Leung <bleung@chromium.org>
BUG=chrome-os-partner:17336
TEST=cat /sys/bus/i2c/devices/2-004a/power/wakeup
Check that it returns "disabled"
Suspend the system using powerd_suspend.
Check that the touch device 2-004a does not wake the system.

Change-Id: If5ac3b30c137d16e5592d4a2ee555fd2533b0caa
Reviewed-on: https://gerrit.chromium.org/gerrit/41679
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Puneet Kumar <puneetster@chromium.org>
Commit-Queue: Benson Leung <bleung@chromium.org>
Tested-by: Benson Leung <bleung@chromium.org>