nfs: replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/file.c

@@ -526,7 +526,7 @@ static int do_vfs_lock(struct file *file, struct file_lock *fl)
 	if (res < 0)
 		dprintk(KERN_WARNING "%s: VFS is out of sync with lock manager"
 			" - error %d!\n",
-				__FUNCTION__, res);
+				__func__, res);
 	return res;
 }