align fs_names table to indexes defined in include/fs.h

Signed-off-by: Olivier Hardouin <olivier.hardouin@gmail.com>

mount.c

@@ -59,6 +59,7 @@ char *fs_names[] = {
 	"",
 	"NTFS",
 	"",
+	"EXFAT",
 	"EXT4"
 };