usb: dwc2: gadget: initialize controller in pullup callback

USB reset interrupt is no more used to reset the controller.
Thus, reset the controller in pullup callback as described by
Synopsys programming guide. Otherwise enumeration sometimes
fails when usb configuration is switched without physical
disconnection.
Tested-by: NRobert Baldyga <r.baldyga@samsung.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NGregory Herrero <gregory.herrero@intel.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/dwc2/gadget.c

@@ -3162,6 +3162,7 @@ static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on)
 	if (is_on) {
 		clk_enable(hsotg->clk);
 		hsotg->enabled = 1;
+		s3c_hsotg_core_init_disconnected(hsotg, false);
 		s3c_hsotg_core_connect(hsotg);
 	} else {
 		s3c_hsotg_core_disconnect(hsotg);