md: Use existed macros instead of numbers

Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/include/linux/raid/md_p.h b/include/linux/raid/md_p.h
index 6f6df86..8c0a3ad 100644
--- a/include/linux/raid/md_p.h
+++ b/include/linux/raid/md_p.h
@@ -281,6 +281,10 @@
 					    * active device with same 'role'.
 					    * 'recovery_offset' is also set.
 					    */
-#define	MD_FEATURE_ALL			(1|2|4|8|16)
+#define	MD_FEATURE_ALL			(MD_FEATURE_BITMAP_OFFSET	\
+					|MD_FEATURE_RECOVERY_OFFSET	\
+					|MD_FEATURE_RESHAPE_ACTIVE	\
+					|MD_FEATURE_BAD_BLOCKS		\
+					|MD_FEATURE_REPLACEMENT)
 
 #endif