zenfone6: decrease vendor.display.config to 1.5
diff --git a/device.mk b/device.mk
index c8abd70..0a904e5 100755
--- a/device.mk
+++ b/device.mk
@@ -138,7 +138,7 @@
     android.hidl.base@1.0
 
 PRODUCT_PACKAGES += \
-    vendor.display.config@1.7
+    vendor.display.config@1.5
 
 # Telephony
 PRODUCT_PACKAGES += \