Clean up BoardConfig.mk

Fix reference to nonexistent graphics library, clean up MTP override.
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 6a26f1f..e347c54 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -77,7 +77,7 @@
 MAX_EGL_CACHE_KEY_SIZE := 12*1024
 MAX_EGL_CACHE_SIZE := 2048*1024
 NUM_FRAMEBUFFER_SURFACE_BUFFERS := 3
-OVERRIDE_RS_DRIVER := libRSDriver_adreno.so
+OVERRIDE_RS_DRIVER := libRSDriver.so
 TARGET_CONTINUOUS_SPLASH_ENABLED := true
 TARGET_HAVE_NEW_GRALLOC := true
 
@@ -95,9 +95,6 @@
 #TARGET_GPS_HAL_PATH := $(LOCAL_PATH)/gps
 #TARGET_NO_RPC := true
 
-#MTP OVERRIDE
-TARGET_PROVIDES_MTP := true
-
 # Init
 TARGET_INIT_VENDOR_LIB := libinit_msm
 TARGET_LIBINIT_DEFINES_FILE := $(LOCAL_PATH)/init/init_gprimeltecan.cpp