scsi: snic: Remove unnecessary condition

ret is always zero or error so the assignment is redundant.

Link: https://lore.kernel.org/r/20200925060754.156599-1-jingxiangfeng@huawei.com


Acked-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>