chell: Blink LED in S0iX
chell: Blink LED in S0iX

Blink the LED in S3 as well as S0iX states so there is no user visible
difference in their behavior.

BUG=chrome-os-partner:49274
BRANCH=glados
TEST=Enter S0iX on chell (need SKU4) and verify LED blinks.  Also verify
that the LED still blinks in S3.

Change-Id: I91b123de17787159f4e7d6aca2e86b80885b8f4e
Signed-off-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/326740
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