grunt: Wire up the EC SMI handler

This won't actually get called yet since the GPIO pin has not been
configured as SMI.

BUG=b:80295434
TEST=grunt: Made sure events could be processed.

Change-Id: I189e26196e4543b3e34bff5d9df8566eff07d585
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/26546
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2 files changed