ASoC: rouleur: Reduce PA Gain for low state of charge based on dt node

Configure low PA Gain for low state of charge based on dt node.

Change-Id: I7f36cf4b17d9794a2763edc3c2fd5cec53a3521f
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>

asoc/codecs/rouleur/internal.h

@@ -108,6 +108,7 @@ struct rouleur_pdata {
 	int num_supplies;
 	int reset_reg;
 	int foundry_id_reg;
+	u32 soc_threshold_val;
 };
 
 struct wcd_ctrl_platform_data {