usb: s3c-otg: Rename usb/s3c_udc.h to usb/dwc2_udc.h

The driver is actually for the Designware DWC2 controller.
This patch renames the global s3c_udc.h header to dwc2_udc.h.

The rename is done automatically:
	$ sed -i "s/s3c_udc\.h/dwc2_udc.h/g" \
		`git grep "s3c_udc\.h" | cut -d : -f 1`

Signed-off-by: Marek Vasut <marex@denx.de>

include/usb/dwc2_udc.h

@@ -1,13 +1,13 @@
 /*
- * drivers/usb/gadget/s3c_udc.h
+ * drivers/usb/gadget/dwc2_udc.h
  * Designware DWC2 on-chip full/high speed USB device controllers
  * Copyright (C) 2005 for Samsung Electronics
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
-#ifndef __S3C_USB_GADGET
-#define __S3C_USB_GADGET
+#ifndef __DWC2_USB_GADGET
+#define __DWC2_USB_GADGET
 
 #define PHY0_SLEEP              (1 << 5)
 
@@ -22,4 +22,4 @@ struct dwc2_plat_otg_data {
 
 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata);
 
-#endif
+#endif	/* __DWC2_USB_GADGET */