ASoC: Add pin switches for fixed analogue inputs and outputs on Speyside

Pin switches enable direct control of the DAPM state from userspace,
enabling simple enabling and disabling of the path. This is especially
useful for outputs such as the speaker which are composed of several
physical devices as it allows them to be controlled as a group.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Acked-by: Liam Girdwood <lrg@ti.com>

sound/soc/samsung/speyside.c

@@ -190,6 +190,12 @@ static struct snd_soc_codec_conf speyside_codec_conf[] = {
 	},
 };
 
+static const struct snd_kcontrol_new controls[] = {
+	SOC_DAPM_PIN_SWITCH("Main Speaker"),
+	SOC_DAPM_PIN_SWITCH("Main DMIC"),
+	SOC_DAPM_PIN_SWITCH("Main AMIC"),
+};
+
 static struct snd_soc_dapm_widget widgets[] = {
 	SND_SOC_DAPM_HP("Headphone", NULL),
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
@@ -238,6 +244,8 @@ static struct snd_soc_card speyside = {
 
 	.set_bias_level = speyside_set_bias_level,
 
+	.controls = controls,
+	.num_controls = ARRAY_SIZE(controls),
 	.dapm_widgets = widgets,
 	.num_dapm_widgets = ARRAY_SIZE(widgets),
 	.dapm_routes = audio_paths,