scsi: lpfc: Remove redundant initialization to variable rc

The variable rc is being initialized with a value that is never read and it
is being updated later with a new value.  The initialization is redundant
and can be removed.

Link: https://lore.kernel.org/r/20200507203111.64709-1-colin.king@canonical.comSigned-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Addresses-Coverity: ("Unused value")

drivers/scsi/lpfc/lpfc_attr.c

@@ -4877,7 +4877,7 @@ lpfc_request_firmware_upgrade_store(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;
 	struct lpfc_hba *phba = vport->phba;
-	int val = 0, rc = -EINVAL;
+	int val = 0, rc;
 
 	/* Sanity check on user data */
 	if (!isdigit(buf[0]))