chrome ec: call DPTF thermal threshold event handler

When an EC thermal event occurs call the DPTF thermal threshold
event handler to handle notifications.

Change-Id: Ica928790bb478fccf8a46afef4eb7800589518b2
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5726
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/ec/google/chromeec/acpi/ec.asl

@@ -379,6 +379,10 @@ Device (EC0)
 		/* When sensor ID returns 0xFF then no more events */
 		While (LNotEqual (Local0, EC_TEMP_SENSOR_NOT_PRESENT))
 		{
+			If (CondRefOf (\_SB.DPTF.TEVT, Local1)) {
+				\_SB.DPTF.TEVT (Local0)
+			}
+
 			/* Keep reaading sensor ID for event */
 			Store (^PATI, Local0)
 		}