scsi: qedf: Remove redundant assignment to variable 'rc'

This assignment is meaningless. Remove it.

Link: https://lore.kernel.org/r/20200917021906.175933-1-jingxiangfeng@huawei.com


Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>