scsi: core: Clean up scsi_noretry_cmd()

No need for else after return.

Link: https://lore.kernel.org/r/20200910074843.217661-2-damien.lemoal@wdc.com


Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>