usb: dwc3: no need to initialize ret variable

First usage of ret variable will re-write initial value. Thus, there is no need
to initialize it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 1160ff4..4af4c35 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -393,7 +393,7 @@
 	struct extcon_dev	*edev;
 	struct regulator	*vbus_reg = NULL;
 
-	int			ret = -ENOMEM;
+	int			ret;
 	int			irq;
 
 	int			utmi_mode = 0;