xfs/273: fix test for internal zoned filesystems

For XFS filesystems with internal zoned sections, fsmap reports a u32
cookie for the device instead of an actual major/minor.  Adjust the test
accordingly.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zorro Lang <zlang@kernel.org>