usb: chipidea: usbmisc_imx: fix returnvar.cocci warnings

drivers/usb/chipidea/usbmisc_imx.c:277:5-8: Unneeded variable: "ret". Return "0" on line 297

Removes unneeded variable used to store return value.

Generated by: scripts/coccinelle/misc/returnvar.cocci

Cc: Julia Lawall <[e-mail]>
Signed-off-by: Peter Chen <[e-mail]>
Signed-off-by: Fengguang Wu <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/chipidea/usbmisc_imx.c

···
 	unsigned long flags;
 	struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
 	u32 val;
-	int ret = 0;
 
 	usbmisc_imx6q_init(data);
 
···
 		spin_unlock_irqrestore(&usbmisc->lock, flags);
 	}
 
-	return ret;
+	return 0;
 }
 
 static int usbmisc_vf610_init(struct imx_usbmisc_data *data)