scsi: qla4xxx: Drop redundant memset()

The region set by the call to memset() is immediately overwritten by the
subsequent call to memcpy(). Drop redundant memset().

Link: https://lore.kernel.org/r/1650533091-28815-1-git-send-email-baihaowen@meizu.com


Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>