GPIO ASL APIs to get GPIO Value. Need such APIs to read GPIO config settings. Example: Kunimitsu need to read AUDIO_DB GPIO to identify codec select. BUG=chrome-os-partner:44481 BRANCH=none TEST=build and boot on Kunimitsu. Change-Id: If56bb7b3eae08e1949d372850a6426dfde5aadd0 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 4983ba835a8da2baf578b035ae482755983c1ecb Original-Change-Id: Ia40d86c8d4b14857fa8822677b3f7d393a35b677 Original-Signed-off-by: Subrata Banik <subrata.banik@intel.com> Original-Reviewed-on: https://chromium-review.googlesource.com/316352 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/12956 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>