ASoC: davinci-mcasp: Discourage use of fck_parent for clock reparenting

The in-driver clock reparenting had been added when we did not had other
means to cleanly set the parent for the fck. Now we can use
assigned-clocks/assigned-clock-parents in DT binding. Print warning when
the fck_parent is present for McASP and recommend the switch to the proper
way to handle the clock selection.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/davinci/davinci-mcasp.c

@@ -1517,6 +1517,8 @@ static int mcasp_reparent_fck(struct platform_device *pdev)
 	if (!parent_name)
 		return 0;
 
+	dev_warn(&pdev->dev, "Update the bindings to use assigned-clocks!\n");
+
 	gfclk = clk_get(&pdev->dev, "fck");
 	if (IS_ERR(gfclk)) {
 		dev_err(&pdev->dev, "failed to get fck\n");