usb: new board-specific USB init interface

This commit unifies board-specific USB initialization implementations
under one symbol (usb_board_init), declaration of which is available in
usb.h.

New API allows selective initialization of USB controllers whenever needed.

Signed-off-by: Mateusz Zalega <m.zalega@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
diff --git a/arch/arm/include/asm/ehci-omap.h b/arch/arm/include/asm/ehci-omap.h
index ac83a53..c7bca05 100644
--- a/arch/arm/include/asm/ehci-omap.h
+++ b/arch/arm/include/asm/ehci-omap.h
@@ -145,8 +145,8 @@
 struct ehci_hccr;
 struct ehci_hcor;
 
-int omap_ehci_hcd_init(struct omap_usbhs_board_data *usbhs_pdata,
-		struct ehci_hccr **hccr, struct ehci_hcor **hcor);
+int omap_ehci_hcd_init(int index, struct omap_usbhs_board_data *usbhs_pdata,
+		       struct ehci_hccr **hccr, struct ehci_hcor **hcor);
 int omap_ehci_hcd_stop(void);
 
 #endif /* _OMAP_COMMON_EHCI_H_ */