ps3disk: Do not use dev->bounce_size before it is set

dev->bounce_size is only initialized after it is used to set the queue
limits.  Fix this by using BOUNCE_SIZE instead.

Fixes: a7f18b74 ("ps3disk: pass queue_limits to blk_mq_alloc_disk")
Reported-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Closes: https://lore.kernel.org/39256db9-3d73-4e86-a49b-300dfd670212@gmail.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/06988f959ea6885b8bd7fb3b9059dd54bc6bbad7.1735894216.git.geert+renesas@glider.be


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