CHROMIUM: MALI: Remove drivers/staging/android from include path

This doesn't seem to be needed, so let's remove it.

BUG=chromium:941638
TEST=Build and boot

Change-Id: Iae05175df38f0b684e27488064a5c5cbb58ed353
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1544031
Reviewed-by: Dominik Behr <dbehr@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
diff --git a/drivers/gpu/arm/midgard/platform/rk/Kbuild b/drivers/gpu/arm/midgard/platform/rk/Kbuild
index 661c155..56b6c01 100644
--- a/drivers/gpu/arm/midgard/platform/rk/Kbuild
+++ b/drivers/gpu/arm/midgard/platform/rk/Kbuild
@@ -7,8 +7,6 @@
 # of such GNU licence.
 #
 
-ccflags-y += -I$(srctree)/drivers/staging/android
-
 ifeq ($(CONFIG_MALI_MIDGARD),y)
 	obj-y += platform/rk/mali_kbase_config_rk.o
 else ifeq ($(CONFIG_MALI_MIDGARD),m)