USB: gpio_vbus: put a missing regulator_put() on error

Note that regulator_put() doesn't care about whether ->vbus_draw is
valid or not.
Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/otg/gpio_vbus.c

@@ -319,6 +319,7 @@ static int __init gpio_vbus_probe(struct platform_device *pdev)
 
 	return 0;
 err_otg:
+	regulator_put(gpio_vbus->vbus_draw);
 	free_irq(irq, pdev);
 err_irq:
 	if (gpio_is_valid(pdata->gpio_pullup))