dm: avoid split of quoted strings where possible

drivers/md/dm-crypt.c

drivers/md/dm-ioctl.c

drivers/md/dm-log-userspace-transfer.c

drivers/md/dm-log.c

drivers/md/dm-raid1.c

drivers/md/dm-snap-persistent.c

drivers/md/dm-snap-transient.c

drivers/md/dm-snap.c

drivers/md/dm-stripe.c

drivers/md/dm-table.c

drivers/md/dm-thin-metadata.c

drivers/md/dm-zoned-metadata.c