usb: r8a66597-hcd: fix wrong data access in SuperH on-chip USB

When I used SuperH on-chip USB, there was the problem that accessed
r8a66597_root_hub which was not allocated.

Signed-off-by: Yoshihiro Shimoda <[e-mail]>
Signed-off-by: Paul Mundt <[e-mail]>

drivers/usb/host/r8a66597-hcd.c

···
 {
 	struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
 	unsigned long flags;
+	int port;
 
 	spin_lock_irqsave(&r8a66597->lock, flags);
 
-	r8a66597_root_hub_control(r8a66597, 0);
-	r8a66597_root_hub_control(r8a66597, 1);
+	for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
+		r8a66597_root_hub_control(r8a66597, port);
 
 	spin_unlock_irqrestore(&r8a66597->lock, flags);
 }