ASoC: cs42l42: Only start PLL if it is needed

The PLL is only needed for sclk < 11289600 Hz and cs42l42_pll_config()
will not configure it for higher rates. So it must only be enabled
when it is needed.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210306185553.62053-15-tanureal@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs42l42.c

@@ -887,6 +887,7 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
 	} else {
 		if (!cs42l42->stream_use) {
 			/* SCLK must be running before codec unmute */
+			if ((cs42l42->bclk < 11289600) && (cs42l42->sclk < 11289600))
 				snd_soc_component_update_bits(component, CS42L42_PLL_CTL1,
 							      CS42L42_PLL_START_MASK, 1);