ASoC: tlv320aic32x4: Add rstn gpio to platform data.

Add the possibility to specify a gpio through platform data
so that a HW reset can be issued to the codec.

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/include/sound/tlv320aic32x4.h b/include/sound/tlv320aic32x4.h
index c009f70..24e5d99 100644
--- a/include/sound/tlv320aic32x4.h
+++ b/include/sound/tlv320aic32x4.h
@@ -26,6 +26,7 @@
 	u32 power_cfg;
 	u32 micpga_routing;
 	bool swapdacs;
+	int rstn_gpio;
 };
 
 #endif