Revert "kona: disable audiohalext feature"

This reverts commit aec970e173601b8d0a84583a8616ba21e275090e.

Change-Id: I1d33cb4ad75bb7a25bb8721b3777a325db686f02
diff --git a/configs/kona/kona.mk b/configs/kona/kona.mk
index 8d54144..6e234fb 100644
--- a/configs/kona/kona.mk
+++ b/configs/kona/kona.mk
@@ -43,7 +43,7 @@
 AUDIO_FEATURE_ENABLED_USB_TUNNEL := true
 AUDIO_FEATURE_ENABLED_A2DP_OFFLOAD := true
 AUDIO_FEATURE_ENABLED_3D_AUDIO := false
-AUDIO_FEATURE_ENABLED_AHAL_EXT := false
+AUDIO_FEATURE_ENABLED_AHAL_EXT := true
 DOLBY_ENABLE := false
 endif