[SCSI] csiostor: remove unneeded memset()

No need to memset() this when we just copy over it on the next line.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Naresh Kumar Inna <naresh@chelsio.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>