xfs: remove xfs_buf wrappers

Stop having two different names for many buffer functions and use
the more descriptive xfs_buf_* names directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 48d5f82..fa1e40a 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -644,7 +644,7 @@
 	XFS_BUF_ORDERED(sbp);
 
 	xfsbdstrat(mp, sbp);
-	error = xfs_iowait(sbp);
+	error = xfs_buf_iowait(sbp);
 
 	/*
 	 * Clear all the flags we set and possible error state in the