scsi: core: Introduce scsi_status_is_check_condition()

Add a helper function scsi_status_is_check_condition() to encapsulate the
frequent checks for SAM_STAT_CHECK_CONDITION.

Link: https://lore.kernel.org/r/20210427083046.31620-9-hare@suse.de


Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>