src/soc/intel/cannonlake: Add _PRW for CNVi

Add _PRW so that wake on WLAN feature works.

TEST=Boot to OS and check if WLAN device wakes host.

Change-Id: Id6689754d1c4100615e4e4ae5a7f9846f4bf785f
Signed-off-by: Bora Guvendik <bora.guvendik@intel.com>
Reviewed-on: https://review.coreboot.org/22611
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
3 files changed