nvme: move NVME_QUIRK_DEALLOCATE_ZEROES out of nvme_config_discard

Move the handling of the NVME_QUIRK_DEALLOCATE_ZEROES quirk out of
nvme_config_discard so that it is combined with the normal write_zeroes
limit handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>