Fix build - cpu-features is ARM-specific

Change-Id: I66521f279545a249e3dcb645914f7b66f23cef21
diff --git a/libpixelflinger/codeflinger/load_store.cpp b/libpixelflinger/codeflinger/load_store.cpp
index 023381c..ed20a00 100644
--- a/libpixelflinger/codeflinger/load_store.cpp
+++ b/libpixelflinger/codeflinger/load_store.cpp
@@ -20,7 +20,9 @@
 #include <cutils/log.h>
 #include "codeflinger/GGLAssembler.h"
 
+#ifdef __ARM_ARCH__
 #include <machine/cpu-features.h>
+#endif
 
 namespace android {