usb: s3c-otg: Rename sources to dwc2_*c

The driver is actually for the Designware DWC2 controller.
This patch renames the local source files to dwc2_*c and
adjusts the Makefile to use the new names.
Signed-off-by: NMarek Vasut <marex@denx.de>

drivers/usb/gadget/Makefile

@@ -13,8 +13,8 @@ ifdef CONFIG_USB_GADGET
 obj-$(CONFIG_USB_GADGET_AT91) += at91_udc.o
 obj-$(CONFIG_USB_GADGET_ATMEL_USBA) += atmel_usba_udc.o
 obj-$(CONFIG_USB_GADGET_BCM_UDC_OTG_PHY) += bcm_udc_otg_phy.o
-obj-$(CONFIG_USB_GADGET_S3C_UDC_OTG) += s3c_udc_otg.o
-obj-$(CONFIG_USB_GADGET_S3C_UDC_OTG_PHY) += s3c_udc_otg_phy.o
+obj-$(CONFIG_USB_GADGET_S3C_UDC_OTG) += dwc2_udc_otg.o
+obj-$(CONFIG_USB_GADGET_S3C_UDC_OTG_PHY) += dwc2_udc_otg_phy.o
 obj-$(CONFIG_USB_GADGET_FOTG210) += fotg210.o
 obj-$(CONFIG_CI_UDC)	+= ci_udc.o
 obj-$(CONFIG_USB_GADGET_DOWNLOAD) += g_dnl.o

drivers/usb/gadget/s3c_udc_otg.c → drivers/usb/gadget/dwc2_udc_otg.c

 /*
- * drivers/usb/gadget/s3c_udc_otg.c
+ * drivers/usb/gadget/dwc2_udc_otg.c
  * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers
  *
  * Copyright (C) 2008 for Samsung Electronics
@@ -157,7 +157,7 @@ __weak void otg_phy_off(struct dwc2_udc *dev) {}
 
 /***********************************************************/
 
-#include "s3c_udc_otg_xfer_dma.c"
+#include "dwc2_udc_otg_xfer_dma.c"
 
 /*
  *	udc_disable - disable USB device controller

drivers/usb/gadget/s3c_udc_otg_phy.c → drivers/usb/gadget/dwc2_udc_otg_phy.c

 /*
- * drivers/usb/gadget/s3c_udc_otg.c
+ * drivers/usb/gadget/dwc2_udc_otg.c
  * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers
  *
  * Copyright (C) 2008 for Samsung Electronics

drivers/usb/gadget/s3c_udc_otg_xfer_dma.c → drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c

 /*
- * drivers/usb/gadget/s3c_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
  *
  * Copyright (C) 2009 for Samsung Electronics