Don't build lights module if vendor supplies it

Change-Id: I63589281961e1120e7536798df6d78b8a7af4304
diff --git a/Android.mk b/Android.mk
index d3e494c..d4d5abc 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,8 +1,11 @@
 ifeq ($(call my-dir),$(call project-path-for,qcom-display)/$(TARGET_BOARD_PLATFORM))
 
-display-hals := libgralloc libgenlock libcopybit liblight libvirtual
+display-hals := libgralloc libgenlock libcopybit libvirtual
 display-hals += libhwcomposer liboverlay libqdutils libhdmi libqservice
 display-hals += libmemtrack
+ifneq ($(TARGET_PROVIDES_LIBLIGHT),true)
+display-hals += liblight
+endif
 ifeq ($(call is-vendor-board-platform,QCOM),true)
     include $(call all-named-subdir-makefiles,$(display-hals))
 else