ASoC: stm32: properly get clk from the provider

Instead of using the clk embedded in the clk_hw (which is meant to go
away), a clock provider which need to interact with its own clock should
request clk reference through the clock provider API.
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20210421120512.413057-2-jbrunet@baylibre.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/stm/stm32_sai_sub.c

@@ -484,7 +484,10 @@ static int stm32_sai_add_mclk_provider(struct stm32_sai_sub_data *sai)
 		dev_err(dev, "mclk register returned %d\n", ret);
 		return ret;
 	}
-	sai->sai_mclk = hw->clk;
+
+	sai->sai_mclk = devm_clk_hw_get_clk(dev, hw, NULL);
+	if (IS_ERR(sai->sai_mclk))
+		return PTR_ERR(sai->sai_mclk);
 
 	/* register mclk provider */
 	return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, hw);