usb: s3c-otg: Rename struct s3c_plat_otg_data

The driver is actually for the Designware DWC2 controller.
This patch is the first to rename global symbol, the struct
s3c_plat_otg_data.

The rename is done automatically:
	$ sed -i "s/s3c_plat_otg_data/dwc2_plat_otg_data/g" \
		`git grep s3c_plat_otg_data | cut -d : -f 1`

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

board/broadcom/bcm28155_ap/bcm28155_ap.c

@@ -95,7 +95,7 @@ int board_mmc_init(bd_t *bis)
 #endif
 
 #ifdef CONFIG_USB_GADGET
-static struct s3c_plat_otg_data bcm_otg_data = {
+static struct dwc2_plat_otg_data bcm_otg_data = {
 	.regs_otg	= HSOTG_BASE_ADDR
 };