usb: dwc3: meson-g12a: Disable the regulator in the error handling path of the probe

If an error occurs after a successful 'regulator_enable()' call,
'regulator_disable()' must be called.

Fix the error handling path of the probe accordingly.

The remove function doesn't need to be fixed, because the
'regulator_disable()' call is already hidden in 'dwc3_meson_g12a_suspend()'
which is called via 'pm_runtime_set_suspended()' in the remove function.

Fixes: c99993376f72 ("usb: dwc3: Add Amlogic G12A DWC3 glue")
Reviewed-by: Martin Blumenstingl <[e-mail]>
Acked-by: Neil Armstrong <[e-mail]>
Signed-off-by: Christophe JAILLET <[e-mail]>
Link: https://lore.kernel.org/r/79df054046[e-mail]
Cc: stable <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/dwc3/dwc3-meson-g12a.c

···
 
 	ret = priv->drvdata->usb_init(priv);
 	if (ret)
-		goto err_disable_clks;
+		goto err_disable_regulator;
 
 	/* Init PHYs */
 	for (i = 0 ; i < PHY_COUNT ; ++i) {
 		ret = phy_init(priv->phys[i]);
 		if (ret)
-			goto err_disable_clks;
+			goto err_disable_regulator;
 	}
 
 	/* Set PHY Power */
···
 err_phys_exit:
 	for (i = 0 ; i < PHY_COUNT ; ++i)
 		phy_exit(priv->phys[i]);
+
+err_disable_regulator:
+	if (priv->vbus)
+		regulator_disable(priv->vbus);
 
 err_disable_clks:
 	clk_bulk_disable_unprepare(priv->drvdata->num_clks,