intel/amenia: Add GPE routing settings

This patch sets the devicetree for gpe0_dw configuration
and also configures the GPIO lines for SCI. EC_SCI_GPI
is configured to proper value.

BUG = chrome-os-partner:53438
TEST = Toggle pch_sci_l from ec console using gpioset command
       and see that the sci counter increases in /sys/firmware/acpi/interrupt
       and also 9 in /proc/interrupt

Change-Id: I3ae9ef7c6a3c8688bcb6cb4c73f5618e7cde342c
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/15325
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
3 files changed