aoe: pass queue_limits to blk_mq_alloc_disk

Pass the few limits aoe imposes directly to blk_mq_alloc_disk instead
of setting them one at a time and improve the way the default
max_hw_sectors is initialized while we're at it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240215070300.2200308-3-hch@lst.de


Signed-off-by: Jens Axboe <axboe@kernel.dk>