chromeec: ec_mec: Fix misaligned data access

Long auto-increment access cannot be used when our initial address is
misaligned or when our terminal address is misaligned on write
operations.

BUG=chrome-os-partner:38224
TEST=Verify host command functionality on cyan.
BRANCH=None

Change-Id: Ieba0e8e05dabd44a28c63d5d56a2a634c2d349bf
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: a7237c8df027ae70a38478846ff3d5ce97543ff1
Original-Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Original-Change-Id: Id709ca92cc386f9ea5b2a1139733961e1bc59354
Original-Reviewed-on: https://chromium-review.googlesource.com/266653
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/9987
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed