configs: Fix syntax issue of SVA 5.0 channel idx on talos

Fix syntax issue of SVA 5.0 channel index on talos.

Change-Id: Ib5a09d1d24a22eb10d7431209f7a379bec491e1a
Signed-off-by: Narsinga Rao Chella <nrchella@codeaurora.org>
diff --git a/configs/msmsteppe_au/msmsteppe_au.mk b/configs/msmsteppe_au/msmsteppe_au.mk
index fcddc55..b99619e 100644
--- a/configs/msmsteppe_au/msmsteppe_au.mk
+++ b/configs/msmsteppe_au/msmsteppe_au.mk
@@ -40,7 +40,7 @@
 AUDIO_FEATURE_ENABLED_DLKM := true
 BOARD_SUPPORTS_SOUND_TRIGGER := true
 BOARD_SUPPORTS_OPENSOURCE_STHAL := true
-AUDIO_FEATURE_ENABLED_SVA_CHANNEL_IDX
+AUDIO_FEATURE_ENABLED_SVA_CHANNEL_IDX := true
 AUDIO_FEATURE_QSSI_COMPLIANCE := true
 AUDIO_FEATURE_ENABLED_INSTANCE_ID := true
 ifeq ($(TARGET_HAS_GENERIC_KERNEL_HEADERS), true)