serial: 8250_dw: Emit an error message if getting the baudclk failed

Instead of silently giving up, at least tell what the problem is.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240222111922.2016122-2-u.kleine-koenig@pengutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_dw.c

@@ -597,7 +597,8 @@ static int dw8250_probe(struct platform_device *pdev)
 	if (data->clk == NULL)
 		data->clk = devm_clk_get_optional_enabled(dev, NULL);
 	if (IS_ERR(data->clk))
-		return PTR_ERR(data->clk);
+		return dev_err_probe(dev, PTR_ERR(data->clk),
+				     "failed to get baudclk\n");
 
 	INIT_WORK(&data->clk_work, dw8250_clk_work_cb);
 	data->clk_notifier.notifier_call = dw8250_clk_notifier_cb;