google/rush: Add BCT support in mainboard rush

Changes might be required for .bct files as we get to know more.
Pulling in files from mainboard nyan for now

BUG=None
BRANCH=None
TEST=Compiles successfully for rush

Change-Id: Iaf81a384af0469c77940cf7309ba68018110b5eb
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://chromium-review.googlesource.com/203144
Tested-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit d3633f8cf8c01a07b54ceef2dd7bf7a64afd7c76)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/8412
Reviewed-by: Aaron Durbin <adurbin@google.com>
13 files changed