usb: phy: change some comments

- Delete the OTG stuffs
- .set_suspend is for controller, not for A-device or B-device.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

include/linux/usb/phy.h

-/* USB OTG (On The Go) defines */
 /*
+ * USB PHY defines
  *
  * These APIs may be used between USB controllers.  USB device drivers
  * (for either host or peripheral roles) don't use these calls; they
@@ -106,7 +106,7 @@ struct usb_phy {
 	int	(*set_power)(struct usb_phy *x,
 				unsigned mA);
 
-	/* for non-OTG B devices: set transceiver into suspend mode */
+	/* Set transceiver into suspend mode */
 	int	(*set_suspend)(struct usb_phy *x,
 				int suspend);