usb: dwc2: remove unused variable regs_otg

Remove the global regs_otg variable.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
diff --git a/drivers/usb/gadget/dwc2_udc_otg.c b/drivers/usb/gadget/dwc2_udc_otg.c
index 3c7ad03..edca05d 100644
--- a/drivers/usb/gadget/dwc2_udc_otg.c
+++ b/drivers/usb/gadget/dwc2_udc_otg.c
@@ -140,7 +140,6 @@
 
 /***********************************************************/
 
-void __iomem		*regs_otg;
 struct dwc2_usbotg_reg *reg;
 
 bool dfu_usb_get_reset(void)
@@ -818,8 +817,6 @@
 
 	reg = (struct dwc2_usbotg_reg *)pdata->regs_otg;
 
-	/* regs_otg = (void *)pdata->regs_otg; */
-
 	dev->gadget.is_dualspeed = 1;	/* Hack only*/
 	dev->gadget.is_otg = 0;
 	dev->gadget.is_a_peripheral = 0;