xfs: fix type usage

Be consistent about using uint32_t/uint8_t instead of u32/u8.  This is
more so that we don't have to maintain /those/ types in xfsprogs.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
diff --git a/fs/xfs/libxfs/xfs_iext_tree.c b/fs/xfs/libxfs/xfs_iext_tree.c
index 343a942..19e546a 100644
--- a/fs/xfs/libxfs/xfs_iext_tree.c
+++ b/fs/xfs/libxfs/xfs_iext_tree.c
@@ -302,7 +302,7 @@
 	xfs_fileoff_t		offset)
 {
 	uint64_t		rec_offset = rec->lo & XFS_IEXT_STARTOFF_MASK;
-	u32			rec_len = rec->hi & XFS_IEXT_LENGTH_MASK;
+	uint32_t		rec_len = rec->hi & XFS_IEXT_LENGTH_MASK;
 
 	if (rec_offset > offset)
 		return 1;