ASoC: ti: davinci-evm: Do not fail if the dai_set_sysclk returns -ENOTSUPP

The davinci McBSP (davinci-i2s) driver does not implement the set_sysclk
callback, which is fine and should not be treated as error.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190830103841.25128-5-peter.ujfalusi@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/ti/davinci-evm.c

@@ -68,7 +68,7 @@ static int evm_hw_params(struct snd_pcm_substream *substream,
 
 	/* set the CPU system clock */
 	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
-	if (ret < 0)
+	if (ret < 0 && ret != -ENOTSUPP)
 		return ret;
 
 	return 0;