ryu: Select pwr btn polarity based on board id

Proto 0,1,2 boards had pwr btn active high. Proto 3 onwards boards will have pwr
btn active low. Thus, select power btn polarity based on board id.

BUG=chrome-os-partner:33545
BRANCH=None
TEST=Compiles successfully and boots to kernel prompt on ryu proto 1.

Change-Id: I9b06b10358b91d40cfdb418ef8cf4da1ae833121
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 7100a42b53a09ed4cb298f88d6f804f46fecacb5
Original-Change-Id: Icdf51b9324385de00f5787e81018518c5397215f
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/229011
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9418
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
3 files changed