tegra132: add bootblock_mainboard_early_init()

Instead of hard coding certain pieces of a board in the common
chipset code provide a way to initialize things early in the
bootblock path. Add a bootblock_mainboard_early_init() function
before console init to performany necessary mainboard initialization
early in the bootblock.

BUG=chrome-os-partner:31104
BUG=chrome-os-partner:31105
BUG=chrome-os-partner:29981
BRANCH=None
TEST=built both on rush and ryu. rush still behaves the same.

Change-Id: Idcf081eeffd189a4e2cbfeb8a4ac5dd0a3d1f838
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4a523add6de03bea0d88e95b9dbb5e283c629400
Original-Change-Id: I7d93641dff3a961f120e8f0ec2d959182477ef87
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/210835
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/8877
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
4 files changed