blooglet: remove kbbacklight support with non-kbbacklight SKU.
blooglet: remove kbbacklight support with non-kbbacklight SKU.

BUG=b:138180187
BRANCH=octopus
TEST=make sure ectool inventory doesn't show keyboard backlight support
with non-kbbacklight SKU.

Change-Id: Iac1c9b19e139641b88a0407189608dcc2bbfc360
Signed-off-by: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1760659
Reviewed-by: Justin TerAvest <f2d83486a72e2fb2fbfb163be787ddf5d8d3393e@chromium.org>

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