hal: Add support to set island cfg and power mode for voice usecase

Add new APIs to set/reset island cfg and power mode in rx and tx
port separately during voice call usecase.

Change-Id: I01dae7c1e16a4c995e49bb81a534371af5f886fd
diff --git a/hal/voice.h b/hal/voice.h
index 94782b8..1f0978a 100644
--- a/hal/voice.h
+++ b/hal/voice.h
@@ -63,6 +63,16 @@
     bool in_call;
 };
 
+struct power_mode_cfg {
+   bool enable;
+   char *mixer_ctl;
+};
+
+struct island_cfg {
+   bool enable;
+   char *mixer_ctl;
+};
+
 enum {
     INCALL_REC_NONE = -1,
     INCALL_REC_UPLINK,