usb: s3c-otg: Rename USB_GADGET_S3C_UDC_OTG* to USB_GADGET_DWC2_OTG*

The s3c-otg IP block is in fact a DWC2 OTG one, so finally rename the
config option to make it less misleading. No functional change, just
a mechanical change done using the following script:

  git grep USB_GADGET_S3C_UDC_OTG | cut -d : -f 1 | sort -u | \
  while read line ; do
    sed -i "s/USB_GADGET_S3C_UDC_OTG/USB_GADGET_DWC2_OTG/g" $line ;
  done

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index dd4df00..c915c79 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -13,8 +13,8 @@
 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) += dwc2_udc_otg.o
-obj-$(CONFIG_USB_GADGET_S3C_UDC_OTG_PHY) += dwc2_udc_otg_phy.o
+obj-$(CONFIG_USB_GADGET_DWC2_OTG) += dwc2_udc_otg.o
+obj-$(CONFIG_USB_GADGET_DWC2_OTG_PHY) += dwc2_udc_otg_phy.o
 obj-$(CONFIG_USB_GADGET_FOTG210) += fotg210.o
 obj-$(CONFIG_CI_UDC)	+= ci_udc.o
 obj-$(CONFIG_USB_GADGET_DOWNLOAD) += g_dnl.o