usb: dwc3: meson-g12a: fix device leaks at unbind

Make sure to drop the references taken to the child devices by
of_find_device_by_node() during probe on driver unbind.

Fixes: c999933 ("usb: dwc3: Add Amlogic G12A DWC3 glue")
Cc: stable@vger.kernel.org	# 5.2
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20250724091910.21092-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: jhovold

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

@@ -837,6 +837,9 @@ static void dwc3_meson_g12a_remove(struct platform_device *pdev)
 
 	usb_role_switch_unregister(priv->role_switch);
 
+	put_device(priv->switch_desc.udc);
+	put_device(priv->switch_desc.usb2_port);
+
 	of_platform_depopulate(dev);
 
 	for (i = 0 ; i < PHY_COUNT ; ++i) {