xfs: fail dax mount if reflink is enabled on a partition

Failure notification is not supported on partitions.  So, when we mount a
reflink enabled xfs on a partition with dax option, let it fail with
-EINVAL code.

Link: https://lkml.kernel.org/r/20220609143435.393724-1-ruansy.fnst@fujitsu.com


Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>