Fix compiler warning of un-used variables

Change-Id: I17d05bbf75a201fd010fc17e2d9bd0db8ef36d41
diff --git a/av1/encoder/encodemb.c b/av1/encoder/encodemb.c
index 4d035ae..e345ba4 100644
--- a/av1/encoder/encodemb.c
+++ b/av1/encoder/encodemb.c
@@ -417,7 +417,8 @@
       { av1_quantize_dc_facade, av1_highbd_quantize_dc_facade },
       { NULL, NULL } };
 
-#else
+#elif !CONFIG_PVQ
+
 typedef enum QUANT_FUNC {
   QUANT_FUNC_LOWBD = 0,
   QUANT_FUNC_LAST = 1