Disable the in-tree galcore module

Change-Id: Iab60132220f1f1ff9ecfec79bbac22f3c38e2edd
diff --git a/defconfig b/defconfig
index 29f5651..4ce8b03 100644
--- a/defconfig
+++ b/defconfig
@@ -79,4 +79,4 @@
 CONFIG_USB_G_HID=y
 CONFIG_USB_SERIAL=y
 CONFIG_USB_SERIAL_CP210X=y
-
+CONFIG_MXC_GPU_VIV=n