ASoC: core: Rename card mutex subclass to better align with usage

Change SND_SOC_CARD_CLASS_PCM to SND_SOC_CARD_CLASS_RUNTIME to better
describe all uses for this mutex subclass and align with DAPM too.
Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/sound/soc.h

@@ -290,7 +290,7 @@ enum snd_soc_pcm_subclass {
 
 enum snd_soc_card_subclass {
 	SND_SOC_CARD_CLASS_INIT		= 0,
-	SND_SOC_CARD_CLASS_PCM	= 1,
+	SND_SOC_CARD_CLASS_RUNTIME	= 1,
 };
 
 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,