Android: disable i9x5 drivers on non-x86 builds

The i965 driver has become dependent on x86 specific compiler builtin
functions, so ensure it's disabled for non-x86 builds.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Rob Herring <robh@kernel.org>
diff --git a/Android.mk b/Android.mk
index 9dc0bbd..72a9b04 100644
--- a/Android.mk
+++ b/Android.mk
@@ -75,6 +75,10 @@
 MESA_BUILD_CLASSIC := $(strip $(foreach d, $(BOARD_GPU_DRIVERS), $(patsubst $(d).%,%, $(filter $(d).%, $(classic_drivers)))))
 MESA_BUILD_GALLIUM := $(strip $(foreach d, $(BOARD_GPU_DRIVERS), $(patsubst $(d).%,%, $(filter $(d).%, $(gallium_drivers)))))
 endif
+ifeq ($(filter x86%,$(TARGET_ARCH)),)
+	MESA_BUILD_CLASSIC :=
+endif
+
 $(foreach d, $(MESA_BUILD_CLASSIC) $(MESA_BUILD_GALLIUM), $(eval $(d) := true))
 
 # host and target must be the same arch to generate matypes.h