libxfs: rename bli_format to avoid confusion with bli_formats

libxfs: rename bli_format to avoid confusion with bli_formats

Rename the bli_format structure to __bli_format to avoid
accidently confusing them with the bli_formats pointer.

(nb: userspace currently has no bli_formats pointer)

Source kernel commit: b94381737e9c4d014a4003e8ece9ba88670a2dd4

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>