mb/google/poppy: Configure GPP_B0 for WLAN wake

As per the latest schematics, this change configures GPP_B0 for WLAN
wake and uses corresponding gpe bit in ACPI node for WLAN. This hasn't 
been tested yet.

BUG=b:70775494

Change-Id: I5198b8083a87d00f890b45986e5e3f62b81686c2
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/22928
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed