block: clear BLK_FEAT_PCI_P2PDMA in blk_stack_limits() for non-supporting devices

block: clear BLK_FEAT_PCI_P2PDMA in blk_stack_limits() for non-supporting devices

BLK_FEAT_NOWAIT and BLK_FEAT_POLL are cleared in blk_stack_limits()
when an underlying device does not support them.  Apply the same
treatment to BLK_FEAT_PCI_P2PDMA: stacking drivers set it
unconditionally and rely on the core to clear it whenever a
non-supporting member device is stacked.

Tested-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested=by: Pranjal Shrivastava <praan@google.com>
Link: https://patch.msgid.link/20260513185153.95552-2-kch@nvidia.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>