serial: 8250: omap: Parse DT wakeup-source proerty

If the wakeup-source property is present, enable wakeup from this
device.
Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20240807141227.1093006-6-msp@baylibre.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_omap.c

@@ -1530,6 +1530,9 @@ static int omap8250_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, priv);
 
 	device_set_wakeup_capable(&pdev->dev, true);
+	if (of_property_read_bool(np, "wakeup-source"))
+		device_set_wakeup_enable(&pdev->dev, true);
+
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_use_autosuspend(&pdev->dev);