hal: add audio support for kona

Add audio support for kona.

Change-Id: Ib1eb05209ce3220e00fa15cddc5338b3f62871f9
diff --git a/hal/audio_extn/hfp.c b/hal/audio_extn/hfp.c
index 3eb96d6..57a3841 100644
--- a/hal/audio_extn/hfp.c
+++ b/hal/audio_extn/hfp.c
@@ -62,7 +62,11 @@
 #define HFP_RX_VOLUME     "PRI AUXPCM LOOPBACK Volume"
 #elif defined PLATFORM_AUTO
 #define HFP_RX_VOLUME     "Playback 36 Volume"
-#elif defined (PLATFORM_MSM8998) || defined (PLATFORM_MSMFALCON) || defined (PLATFORM_SDM845) || defined (PLATFORM_SDM710) || defined (PLATFORM_QCS605) || defined (PLATFORM_MSMNILE) || defined (PLATFORM_MSMSTEPPE) || defined (PLATFORM_QCS405)
+#elif defined (PLATFORM_MSM8998) || defined (PLATFORM_MSMFALCON) || \
+      defined (PLATFORM_SDM845) || defined (PLATFORM_SDM710) || \
+      defined (PLATFORM_QCS605) || defined (PLATFORM_MSMNILE) || \
+      defined (PLATFORM_KONA) || defined (PLATFORM_MSMSTEPPE) || \
+      defined (PLATFORM_QCS405)
 #define HFP_RX_VOLUME     "SLIMBUS_7 LOOPBACK Volume"
 #else
 #define HFP_RX_VOLUME     "Internal HFP RX Volume"