usb: musb: Start using struct usb_otg

Use struct usb_otg members with OTG specific functions instead
of usb_phy members.

[ balbi@ti.com: added a missing change on musb_gadget.c to avoid
	a compile error on a later patch ]

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index df719ea..a427fcb 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -132,6 +132,7 @@
 
 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
 {
+	struct usb_otg	*otg = musb->xceiv->otg;
 	u8		devctl;
 	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 	int ret = 1;
@@ -167,7 +168,7 @@
 				otg_set_vbus(musb->xceiv, 1);
 		} else {
 			musb->is_active = 1;
-			musb->xceiv->default_a = 1;
+			otg->default_a = 1;
 			musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 			devctl |= MUSB_DEVCTL_SESSION;
 			MUSB_HST_MODE(musb);
@@ -179,7 +180,7 @@
 		 * jumping right to B_IDLE...
 		 */
 
-		musb->xceiv->default_a = 0;
+		otg->default_a = 0;
 		musb->xceiv->state = OTG_STATE_B_IDLE;
 		devctl &= ~MUSB_DEVCTL_SESSION;