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>
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 5606ae3..c1e7c83 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -182,7 +182,7 @@
 	if (clp == NULL)
 		return SVC_DROP;
 
-	dprintk("%s: %s NFSv4 callback!\n", __FUNCTION__,
+	dprintk("%s: %s NFSv4 callback!\n", __func__,
 			svc_print_addr(rqstp, buf, sizeof(buf)));
 	nfs_put_client(clp);