grunt: Disable ec_feature kbbacklit by SKUID for barla
grunt: Disable ec_feature kbbacklit by SKUID for barla

Disable kbbacklit support for barla.

BUG=b:115882609
BRANCH=grunt
TEST=make buildall -j.

Change-Id: I966938bad94e1c63757a55df750fdbca862b671e
Signed-off-by: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/1235475
Reviewed-by: Edward Hill <db1406b34e091703092b6b136bdfeb2c8125fc0e@chromium.org>

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