pinctrl: tegra-xusb: testing wrong variable in probe()

There is a cut and paste bug so we test the wrong variable. "err" is
never less than zero at this point.

Signed-off-by: Dan Carpenter <[e-mail]>
Acked-by: Stephen Warren <[e-mail]>
Acked-by: Thierry Reding <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/pinctrl-tegra-xusb.c

···
 
 	padctl->provider = devm_of_phy_provider_register(&pdev->dev,
 							 tegra_xusb_padctl_xlate);
-	if (err < 0) {
+	if (IS_ERR(padctl->provider)) {
+		err = PTR_ERR(padctl->provider);
 		dev_err(&pdev->dev, "failed to register PHYs: %d\n", err);
 		goto unregister;
 	}