aleena: Set mode to clamshell for non-convertible SKUs
aleena: Set mode to clamshell for non-convertible SKUs

For clamshell Aleena SKUs, a call to tablet_set_mode(0) is required
on boot. Otherwise we default to tablet mode.

BUG=b:129416203
BRANCH=grunt
TEST=Keyboard and touchpad work on Kasumi

Change-Id: I61dedead5d883335fca06d95dd0dcdddaf831e33
Signed-off-by: Edward Hill <db1406b34e091703092b6b136bdfeb2c8125fc0e@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1544635
Commit-Ready: ChromeOS CL Exonerator Bot <fa429e5907f00867f797423aea74327bb02c91b6@appspot.gserviceaccount.com>
Reviewed-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>

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