exfat: move super block magic number to magic.h

Move exfat superblock magic number from local definition to magic.h.
It is also needed by userspace programs that call fstatfs().

Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

fs/exfat/exfat_fs.h

@@ -10,7 +10,6 @@
 #include <linux/ratelimit.h>
 #include <linux/nls.h>
 
-#define EXFAT_SUPER_MAGIC       0x2011BAB0UL
 #define EXFAT_ROOT_INO		1
 
 #define EXFAT_CLUSTERS_UNTRACKED (~0u)

fs/exfat/super.c

@@ -17,6 +17,7 @@
 #include <linux/iversion.h>
 #include <linux/nls.h>
 #include <linux/buffer_head.h>
+#include <linux/magic.h>
 
 #include "exfat_raw.h"
 #include "exfat_fs.h"

include/uapi/linux/magic.h

@@ -43,6 +43,7 @@
 #define MINIX3_SUPER_MAGIC	0x4d5a		/* minix v3 fs, 60 char names */
 
 #define MSDOS_SUPER_MAGIC	0x4d44		/* MD */
+#define EXFAT_SUPER_MAGIC	0x2011BAB0
 #define NCP_SUPER_MAGIC		0x564c		/* Guess, what 0x564c is :-) */
 #define NFS_SUPER_MAGIC		0x6969
 #define OCFS2_SUPER_MAGIC	0x7461636f