Add missing pre-defined ARM arch compiler macro

Signed-off-by: Raphael Silva <raphael.philipe@ossystems.com.br>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/arch/arch-arm.h b/arch/arch-arm.h
index 7cd9502..bab886e 100644
--- a/arch/arch-arm.h
+++ b/arch/arch-arm.h
@@ -19,7 +19,8 @@
 #endif
 
 #if defined (__ARM_ARCH_4__) || defined (__ARM_ARCH_4T__) \
-	|| defined (__ARM_ARCH_5__) || defined (__ARM_ARCH_5T__) || defined (__ARM_ARCH_5TE__) || defined (__ARM_ARCH_5TEJ__) \
+	|| defined (__ARM_ARCH_5__) || defined (__ARM_ARCH_5T__) || defined (__ARM_ARCH_5E__)\
+	|| defined (__ARM_ARCH_5TE__) || defined (__ARM_ARCH_5TEJ__) \
 	|| defined(__ARM_ARCH_6__)  || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__)
 #define nop             __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t")
 #define read_barrier()	__asm__ __volatile__ ("" : : : "memory")