usb: mv_usb: remove clock name from pdata

Using pdata to pass clock name is not correct.
Directly get clock from usb drivers.

Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

include/linux/platform_data/mv_usb.h

@@ -34,8 +34,6 @@ struct mv_usb_addon_irq {
 };
 
 struct mv_usb_platform_data {
-	unsigned int		clknum;
-	char			**clkname;
 	struct mv_usb_addon_irq	*id;	/* Only valid for OTG. ID pin change*/
 	struct mv_usb_addon_irq	*vbus;	/* valid for OTG/UDC. VBUS change*/