usb: s3c-otg: Tweak the comments

The driver is actually for the Designware DWC2 controller.
Tweak the comments in the driver to reflect this fact.
Signed-off-by: NMarek Vasut <marex@denx.de>

drivers/usb/gadget/dwc2_udc_otg.c

 /*
  * drivers/usb/gadget/dwc2_udc_otg.c
- * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers
+ * Designware DWC2 on-chip full/high speed USB OTG 2.0 device controllers
  *
  * Copyright (C) 2008 for Samsung Electronics
  *

drivers/usb/gadget/dwc2_udc_otg_phy.c

 /*
  * drivers/usb/gadget/dwc2_udc_otg.c
- * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers
+ * Designware DWC2 on-chip full/high speed USB OTG 2.0 device controllers
  *
  * Copyright (C) 2008 for Samsung Electronics
  *

drivers/usb/gadget/dwc2_udc_otg_priv.h

 /*
- * Samsung S3C on-chip full/high speed USB device controllers
+ * Designware DWC2 on-chip full/high speed USB device controllers
  * Copyright (C) 2005 for Samsung Electronics
  *
  * SPDX-License-Identifier:	GPL-2.0+

drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c

 /*
  * drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
- * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers
+ * Designware DWC2 on-chip full/high speed USB OTG 2.0 device controllers
  *
  * Copyright (C) 2009 for Samsung Electronics
  *

include/usb/s3c_udc.h

 /*
  * drivers/usb/gadget/s3c_udc.h
- * Samsung S3C on-chip full/high speed USB device controllers
+ * Designware DWC2 on-chip full/high speed USB device controllers
  * Copyright (C) 2005 for Samsung Electronics
  *
  * SPDX-License-Identifier:	GPL-2.0+