bullhead: set drm.service.enabled to true

Change-Id: Ifdcb62a96f2106c139df613b81fe12f068d37cec
diff --git a/device.mk b/device.mk
index 5116469..e4d610b 100644
--- a/device.mk
+++ b/device.mk
@@ -209,6 +209,9 @@
 PRODUCT_PROPERTY_OVERRIDES += \
     ro.frp.pst=/dev/block/platform/soc.0/f9824900.sdhci/by-name/persistent
 
+PRODUCT_PROPERTY_OVERRIDES += \
+    drm.service.enabled=true
+
 # for perfd
 PRODUCT_PROPERTY_OVERRIDES += \
     ro.min_freq_0=384000