mb/google/dedede: Enable wake from S0ix on EC_HOST_EVENT_HANG_DETECT

BUG=b:279097356
TEST=On dibbi:
- flash OS 15449.0.0 (where suspend is broken due to b:274531972)
- run `suspend_stress_test --count=1 --suspend_max=30 --suspend_min=28`
- check the AP wakes up immediately when the EC detects a sleep hang

Change-Id: I24a2aa5de1f76e6dd1c1ce726b648583756e5e55
Signed-off-by: Reka Norman <rekanorman@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76938
Reviewed-by: Sam McNally <sammc@google.com>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/mainboard/google/dedede/variants/baseboard/include/baseboard/ec.h

@@ -51,7 +51,8 @@
 #define MAINBOARD_EC_S0IX_WAKE_EVENTS \
 	(MAINBOARD_EC_S3_WAKE_EVENTS |\
 	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_CRITICAL) |\
-	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_SHUTDOWN))
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_SHUTDOWN) |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_HANG_DETECT))
 
 /* Log EC wake events plus EC shutdown events */
 #define MAINBOARD_EC_LOG_EVENTS \