board: rainier: fix accel orientation
board: rainier: fix accel orientation

Rainier has landscape orientation, therefore needs its accelerometer
base values adjusted.

BUG=b:71753415
TEST=Rotate rainier and make sure screen orientation is not off by 90
degrees.
BRANCH=None

Signed-off-by: Ege Mihmanli <2f34fa6da64e4ae1c427a9b68d0ea6cb785f22c0@google.com>
Change-Id: I60b49e717c691e34a39e817d2c064ea45b8d53d7
Reviewed-on: https://chromium-review.googlesource.com/862733
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec