[GFS2] Remove gfs2_repermission

gfs2_repermission is just a wrapper for permission, so remove it and
call permission directly where required.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/ops_file.c

@@ -640,7 +640,7 @@ static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
 	    !capable(CAP_LINUX_IMMUTABLE))
 		goto out;
 	if (!IS_IMMUTABLE(inode)) {
-		error = gfs2_repermission(inode, MAY_WRITE, NULL);
+		error = permission(inode, MAY_WRITE, NULL);
 		if (error)
 			goto out;
 	}