xfs: kill xfs_bmbt_rec_32/64 types

For a long time we've always stored bmap btree records in the 64bit format,
so kill off the dead 32bit type, and make sure the 64bit type is named just
xfs_bmbt_rec everywhere, without any size postfix.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h
index 5549d49..cf07ca7 100644
--- a/fs/xfs/xfs_bmap_btree.h
+++ b/fs/xfs/xfs_bmap_btree.h
@@ -46,20 +46,12 @@
 #define BMBT_STARTBLOCK_BITLEN	52
 #define BMBT_BLOCKCOUNT_BITLEN	21
 
-
-#define BMBT_USE_64	1
-
-typedef struct xfs_bmbt_rec_32
-{
-	__uint32_t		l0, l1, l2, l3;
-} xfs_bmbt_rec_32_t;
-typedef struct xfs_bmbt_rec_64
-{
+typedef struct xfs_bmbt_rec {
 	__be64			l0, l1;
-} xfs_bmbt_rec_64_t;
+} xfs_bmbt_rec_t;
 
 typedef __uint64_t	xfs_bmbt_rec_base_t;	/* use this for casts */
-typedef xfs_bmbt_rec_64_t xfs_bmbt_rec_t, xfs_bmdr_rec_t;
+typedef xfs_bmbt_rec_t xfs_bmdr_rec_t;
 
 typedef struct xfs_bmbt_rec_host {
 	__uint64_t		l0, l1;