asoc: codecs: Add noise gating register writes

Read noise gate mode from device tree,
set NG2 based on the register read or
set to idle detect mode

Change-Id: Id1e478ad230125d1e35229493cb0fbd6867c6a3b
Signed-off-by: Shazmaan Ali <quic_shazmaan@quicinc.com>

asoc/codecs/wsa884x/internal.h

@@ -397,6 +397,7 @@ struct wsa884x_priv {
 	unsigned long status_mask;
 	struct snd_soc_dai_driver *dai_driver;
 	struct snd_soc_component_driver *driver;
+	int noise_gate_mode;
 };
 
 #endif /* WSA884X_INTERNAL_H */