scsi: qedi: Remove redundant assignment to variable err

Variable err is assigned -ENOMEM followed by an error return path via label
err_udev that does not access the variable and returns with the -ENOMEM
error return code. The assignment to err is redundant and can be removed.

Link: https://lore.kernel.org/r/20210327230650.25803-1-colin.king@canonical.com
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qedi/qedi_main.c

@@ -276,10 +276,8 @@ static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
 	}
 
 	udev = kzalloc(sizeof(*udev), GFP_KERNEL);
-	if (!udev) {
+	if (!udev)
-		rc = -ENOMEM;
 		goto err_udev;
-	}
 
 	udev->uio_dev = -1;