mb/google/grunt: Add grunt touchpad wake GPE to devicestree

The grunt touchpad interrupt can be used as a wake source.  For grunt,
the touchpad interrupt uses GPIO5 which corresponds to GEVENT7.

TEST=In OS: # cat /proc/acpi/wakeup
 => D015	  S3	*enabled   i2c:i2c-ELAN0000:00
TEST=powerd_dbus_suspend, touching touchpad (> 1 sec) wakes from S3.

Change-Id: I510642108a1257f6601f18c77cf3107573427f39
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-on: https://review.coreboot.org/25827
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed