staging: octeon-usb: Remove unnecessary assignment

Remove 'x=a;' from a consecutive double assignment of the form 'x=a; x=b;'.
Issue detected by the semantic patch found here:
https://github.com/coccinelle/coccinellery/blob/master/write2/write2.cocci

Signed-off-by: Rehas Sachdeva <aquannie@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/octeon-usb/octeon-hcd.c

@@ -3292,7 +3292,6 @@ static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf)
 	spin_lock_irqsave(&usb->lock, flags);
 	port_status = cvmx_usb_get_status(usb);
 	spin_unlock_irqrestore(&usb->lock, flags);
-	buf[0] = 0;
 	buf[0] = port_status.connect_change << 1;
 
 	return buf[0] != 0;