Refactor build for grouper.

Change-Id: I52c16e1f050279431528e43c73627e73abf95462
diff --git a/Android.mk b/Android.mk
index bac9337..94650f0 100644
--- a/Android.mk
+++ b/Android.mk
@@ -14,7 +14,7 @@
 
 LOCAL_PATH := $(call my-dir)
 
-ifneq ($(filter grouper,$(TARGET_DEVICE)),)
+ifneq ($(filter grouper tilapia,$(TARGET_DEVICE)),)
 include $(call all-makefiles-under,$(LOCAL_PATH))
 -include vendor/nvidia/common/TegraBoard.mk
 endif