usb: s3c-otg: Rename remaining macros

The driver is actually for the Designware DWC2 controller.
This patch renames the remaining S3C_* macros to match the
DWC2 naming.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/gadget/dwc2_udc_otg_priv.h b/drivers/usb/gadget/dwc2_udc_otg_priv.h
index 1dcb277..5126a9d 100644
--- a/drivers/usb/gadget/dwc2_udc_otg_priv.h
+++ b/drivers/usb/gadget/dwc2_udc_otg_priv.h
@@ -24,8 +24,8 @@
 #define EP_FIFO_SIZE		512
 #define EP_FIFO_SIZE2		1024
 /* ep0-control, ep1in-bulk, ep2out-bulk, ep3in-int */
-#define S3C_MAX_ENDPOINTS	4
-#define S3C_MAX_HW_ENDPOINTS	16
+#define DWC2_MAX_ENDPOINTS	4
+#define DWC2_MAX_HW_ENDPOINTS	16
 
 #define WAIT_FOR_SETUP          0
 #define DATA_STATE_XMIT         1
@@ -81,7 +81,7 @@
 	struct s3c_plat_otg_data *pdata;
 
 	int ep0state;
-	struct dwc2_ep ep[S3C_MAX_ENDPOINTS];
+	struct dwc2_ep ep[DWC2_MAX_ENDPOINTS];
 
 	unsigned char usb_address;