Add av1 prefix to inv_txfm_add

Change-Id: Id7cbb89ba344770297ef42bf1b09a2b9ba5a1378
diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index 6b224c7..8da74ba 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -336,10 +336,10 @@
 #if CONFIG_AOM_HIGHBITDEPTH
   if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
     inv_txfm_param.bd = xd->bd;
-    highbd_inv_txfm_add(dqcoeff, dst, stride, &inv_txfm_param);
+    av1_highbd_inv_txfm_add(dqcoeff, dst, stride, &inv_txfm_param);
   } else {
 #endif  // CONFIG_AOM_HIGHBITDEPTH
-    inv_txfm_add(dqcoeff, dst, stride, &inv_txfm_param);
+    av1_inv_txfm_add(dqcoeff, dst, stride, &inv_txfm_param);
 #if CONFIG_AOM_HIGHBITDEPTH
   }
 #endif  // CONFIG_AOM_HIGHBITDEPTH