ublk: santizize the arguments from userspace when adding a device

Sanity check the values for queue depth and number of queues
we get from userspace when adding a device.

Signed-off-by: Ronnie Sahlberg <rsahlberg@whamcloud.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Fixes: 71f28f31 ("ublk_drv: add io_uring based userspace block driver")
Fixes: 62fe99ce ("ublk: add read()/write() support for ublk char device")
Link: https://lore.kernel.org/r/20250619021031.181340-1-ronniesahlberg@gmail.com


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