dax: remove the pgmap sanity checks in generic_fsdax_supported
Drivers that register a dax_dev should make sure it works, no need to double check from the file system. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NDan Williams <dan.j.williams@intel.com> Reviewed-by: NDarrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/20211129102203.2243509-6-hch@lst.deSigned-off-by: NDan Williams <dan.j.williams@intel.com>
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