Fix the SMI and SCI gpios for Rambi. Also, add in the EC callbacks for the SMI handler. Note that the handler for GPI SMIs has not been tested yet as baytrail chipset code doesn't yet support setting up those configurations yet.
BUG=chrome-os-partner:23505 BRANCH=None TEST=Noted that SCI was enabled in /sys/firmware/acpi/interrupts for the EC's SCI GPI. Also was able to see Chrome EC messages with CONFIG_DEBUG_SMI and powering down at the dev screen.
84da959 rambi: update EC support
src/mainboard/google/rambi/ec.h | 7 ++-
src/mainboard/google/rambi/mainboard_smi.c | 90 +++++++++++++++++++++++++++-
2 files changed, 93 insertions(+), 4 deletions(-)