pktcdvd: Convert to bdev_open_by_dev()

mainline inclusion
from mainline-v6.7-rc1
commit 7ac86df899f0025cfd554c057efb30e5a4ef95b0
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8KPBR
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.7-rc3&id=7ac86df899f0025cfd554c057efb30e5a4ef95b0



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Convert pktcdvd to use bdev_open_by_dev().

Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230927093442.25915-5-jack@suse.cz


Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>