usb: phy: tahvo: fix error handling in tahvo_usb_probe()

If devm_extcon_dev_allocate() fails, we should disable clk before return.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NAlexey Khoroshilov <khoroshilov@ispras.ru>
Fixes: 860d2686 ("usb: phy: tahvo: Use devm_extcon_dev_[allocate|register]() and replace deprecated API")
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/phy/phy-tahvo.c

@@ -368,7 +368,8 @@ static int tahvo_usb_probe(struct platform_device *pdev)
 	tu->extcon = devm_extcon_dev_allocate(&pdev->dev, tahvo_cable);
 	if (IS_ERR(tu->extcon)) {
 		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
-		return -ENOMEM;
+		ret = PTR_ERR(tu->extcon);
+		goto err_disable_clk;
 	}
 
 	ret = devm_extcon_dev_register(&pdev->dev, tu->extcon);