usb: oxu210hp-hcd: Fix memory leak in oxu_create

usb_create_hcd will alloc memory for hcd, and we should
call usb_put_hcd to free it when adding fails to prevent
memory leak.

Fixes: b92a78e5 ("usb host: Oxford OXU210HP HCD driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201123145809.1456541-1-zhangqilong3@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/oxu210hp-hcd.c

@@ -4152,8 +4152,10 @@ static struct usb_hcd *oxu_create(struct platform_device *pdev,
 	oxu->is_otg = otg;
 
 	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
-	if (ret < 0)
+	if (ret < 0) {
+		usb_put_hcd(hcd);
 		return ERR_PTR(ret);
+	}
 
 	device_wakeup_enable(hcd->self.controller);
 	return hcd;