mb/google/kahlee/treeya: Use GPIO_10 for EC_SYNC_IRQ

Use AGPIO 10 as the EC sync interrupt for MKBP events for sensor data.

Reference to Aleena project.

BUG=b:135551210
BRANCH=grunt
TEST=emerge-grunt coreboot

Signed-off-by: Chris Wang <chris.wang@amd.corp-partner.google.com>
Change-Id: Ie0b719ebce90710bca2109b7ff255e19329f9cac
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34902
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward Hill <ecgh@chromium.org>

src/mainboard/google/kahlee/variants/treeya/include/variant/ec.h

@@ -20,3 +20,9 @@
 
 /* Enable Tablet switch */
 #define EC_ENABLE_TBMC_DEVICE
+
+/*
+ * Enable EC sync interrupt via GPIO controller, EC_SYNC_IRQ is defined in
+ * variant/gpio.h
+ */
+#define EC_ENABLE_SYNC_IRQ_GPIO

src/mainboard/google/kahlee/variants/treeya/include/variant/gpio.h

@@ -14,3 +14,6 @@
  */
 
 #include <baseboard/gpio.h>
+
+/* EC sync irq is AGPIO 10 */
+#define EC_SYNC_IRQ	10