hal: Add initial definition for lahaina

Add initial definition for lahaina.

Change-Id: I46408ef30f22791ef495506cc23d4680867ca073
diff --git a/hal/audio_extn/hfp.c b/hal/audio_extn/hfp.c
index bbdbfb5..cb85e1a 100644
--- a/hal/audio_extn/hfp.c
+++ b/hal/audio_extn/hfp.c
@@ -67,7 +67,7 @@
       defined (PLATFORM_KONA) || defined (PLATFORM_MSMSTEPPE) || \
       defined (PLATFORM_QCS405) || defined (PLATFORM_TRINKET) || \
       defined (PLATFORM_LITO) || defined(PLATFORM_ATOLL) || \
-      defined (PLATFORM_BENGAL)
+      defined (PLATFORM_BENGAL) || defined (PLATFORM_LAHAINA)
 #define HFP_RX_VOLUME     "SLIMBUS_7 LOOPBACK Volume"
 #else
 #define HFP_RX_VOLUME     "Internal HFP RX Volume"