scsi: 3w-xxx: Remove redundant initialization of variable retval

The variable retval is being initialized with a value that is never read,
it is being updated immediately afterwards. The assignment is redundant and
can be removed.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>
Addresses-Coverity: ("Unused value")

drivers/scsi/3w-xxxx.c

···
 {
 	struct Scsi_Host *host = NULL;
 	TW_Device_Extension *tw_dev;
-	int retval = -ENODEV;
+	int retval;
 
 	retval = pci_enable_device(pdev);
 	if (retval) {