xfs: remove duplicate buffer flags

Currently we define aliases for the buffer flags in various
namespaces, which only adds confusion.  Remove all but the XBF_
flags to clean this up a bit.

Note that we still abuse XFS_B_ASYNC/XBF_ASYNC for some non-buffer
uses, but I'll clean that up later.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 36a0992d..96be4b0 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -977,7 +977,7 @@
 	xfs_daddr_t		d;
 
 	/* need to sort out how callers deal with failures first */
-	ASSERT(!(flags & XFS_BUF_TRYLOCK));
+	ASSERT(!(flags & XBF_TRYLOCK));
 
 	d = xfs_btree_ptr_to_daddr(cur, ptr);
 	*bpp = xfs_trans_get_buf(cur->bc_tp, mp->m_ddev_targp, d,
@@ -1008,7 +1008,7 @@
 	int			error;
 
 	/* need to sort out how callers deal with failures first */
-	ASSERT(!(flags & XFS_BUF_TRYLOCK));
+	ASSERT(!(flags & XBF_TRYLOCK));
 
 	d = xfs_btree_ptr_to_daddr(cur, ptr);
 	error = xfs_trans_read_buf(mp, cur->bc_tp, mp->m_ddev_targp, d,