ipq806x: add i2c driver

this change ports i2c and other relevant drivers from depthcharge for ipq806x.

BUG=chrome-os-partner:33647
BRANCH=ToT
TEST=Booted storm using vboot2

Change-Id: I3d9a431aa8adb9b91dbccdf031647dfadbafc24c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: a0c615d0a49fd9c0ffa231353800882fff6ab90b
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Change-Id: Id7cc3932ed4ae54f46336aaebde35e84125ebebd
Original-Reviewed-on: https://chromium-review.googlesource.com/229428
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Commit-Queue: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/9685
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
10 files changed