usb: ehci-vf: Add weak function for board specific initialisation

Add a weak function board_ehci_hcd_init which can be used by the board
file for board specific initialisation.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

drivers/usb/host/ehci-vf.c

@@ -121,6 +121,11 @@ static void usb_oc_config(int index)
 	setbits_le32(ctrl, UCTRL_OVER_CUR_DIS);
 }
 
+int __weak board_ehci_hcd_init(int port)
+{
+	return 0;
+}
+
 int ehci_hcd_init(int index, enum usb_init_type init,
 		struct ehci_hccr **hccr, struct ehci_hcor **hcor)
 {
@@ -136,6 +141,9 @@ int ehci_hcd_init(int index, enum usb_init_type init,
 
 	ehci = (struct usb_ehci *)nc_reg_bases[index];
 
+	/* Do board specific initialisation */
+	board_ehci_hcd_init(index);
+
 	usb_power_config(index);
 	usb_oc_config(index);
 	usb_internal_phy_clock_gate(index);