xfs/263: split out the v4 test

Move the v4-specific test into a separate test case so that we can still
run the tests on a kernel without v4 support.

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