Add BOARD_USES_LEGACY_ALSA_AUDIO, set to true

This switch controls whether the device uses the old (when true) or new audio
HAL (otherwise.)

Change-Id: I8098c1db2db46ea444bcc0e188943335420ade3d
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/BoardConfig.mk b/BoardConfig.mk
index fd101c8..79ee8b8 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -31,6 +31,7 @@
 BOARD_MKBOOTIMG_ARGS := --ramdisk_offset 0x01600000
 
 BOARD_USES_ALSA_AUDIO:= true
+BOARD_USES_LEGACY_ALSA_AUDIO:= true
 BOARD_USES_FLUENCE_INCALL := true
 BOARD_USES_SEPERATED_AUDIO_INPUT := true