[ALSA] soc - Add Invert Switch for ROUT2

GTA02 device has a speaker between LOUT2 & ROUT2 and in this mode ROUT2
needs to be inverted. This patch adds a mixer control for this.

Signed-off-by: Graeme Gregory <graeme@openmoko.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/soc/codecs/wm8753.c

@@ -198,6 +198,7 @@ static const char *wm8753_mic_sel[] = {"Mic 1", "Mic 2", "Mic 3"};
 static const char *wm8753_dai_mode[] = {"DAI 0", "DAI 1", "DAI 2", "DAI 3"};
 static const char *wm8753_dat_sel[] = {"Stereo", "Left ADC", "Right ADC",
 	"Channel Swap"};
+static const char *wm8753_rout2_phase[] = {"Non Inverted", "Inverted"};
 
 static const struct soc_enum wm8753_enum[] = {
 SOC_ENUM_SINGLE(WM8753_BASS, 7, 2, wm8753_base),
@@ -228,6 +229,7 @@ SOC_ENUM_SINGLE(WM8753_ADC, 4, 2, wm8753_adc_filter),
 SOC_ENUM_SINGLE(WM8753_MICBIAS, 6, 3, wm8753_mic_sel),
 SOC_ENUM_SINGLE(WM8753_IOCTL, 2, 4, wm8753_dai_mode),
 SOC_ENUM_SINGLE(WM8753_ADC, 7, 4, wm8753_dat_sel),
+SOC_ENUM_SINGLE(WM8753_OUTCTL, 2, 2, wm8753_rout2_phase),
 };
 
 
@@ -330,6 +332,7 @@ SOC_SINGLE("Mic1 Capture Volume", WM8753_INCTL1, 5, 3, 0),
 SOC_ENUM_EXT("DAI Mode", wm8753_enum[26], wm8753_get_dai, wm8753_set_dai),
 
 SOC_ENUM("ADC Data Select", wm8753_enum[27]),
+SOC_ENUM("ROUT2 Phase", wm8753_enum[28]),
 };
 
 /* add non dapm controls */