nfs: switch to ->write_iter()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/nfs/nfs4file.c

@@ -119,9 +119,9 @@ nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 const struct file_operations nfs4_file_operations = {
 	.llseek		= nfs_file_llseek,
 	.read		= new_sync_read,
-	.write		= do_sync_write,
+	.write		= new_sync_write,
 	.read_iter	= nfs_file_read,
-	.aio_write	= nfs_file_write,
+	.write_iter	= nfs_file_write,
 	.mmap		= nfs_file_mmap,
 	.open		= nfs4_file_open,
 	.flush		= nfs_file_flush,