Make sure S0Ix is supported before trying to set up the EC's lazy wake mask. Change-Id: I78896ffe6312409c9f241b3b3224169c188bb265 Signed-off-by: Paul Moy <pmoy@chromium.org> Reviewed-on: https://review.coreboot.org/28610 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin Roth <martinroth@google.com>