scsi: myrs: Add missing ':' to make the kernel-doc checker happy

scsi: myrs: Add missing ':' to make the kernel-doc checker happy

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/myrs.c:1965: warning: Function parameter or member 'dev' not described in 'myrs_is_raid'
 drivers/scsi/myrs.c:1978: warning: Function parameter or member 'dev' not described in 'myrs_get_resync'
 drivers/scsi/myrs.c:2002: warning: Function parameter or member 'dev' not described in 'myrs_get_state'

Link: https://lore.kernel.org/r/20210317091230.2912389-13-lee.jones@linaro.org
Cc: Hannes Reinecke <hare@kernel.org>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Linux GmbH <hare@suse.com>
Cc: "Leonard N. Zubkoff" <lnz@dandelion.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>