deltaq: Use block size / mask macros

Fixes unit tests with ext-partition

Change-Id: I17184c7321e27763eea5434f0d4425d928c0abcc

av1/decoder/decodemv.c

diff --git a/av1/decoder/decodemv.c b/av1/decoder/decodemv.c
index c997068..da0af3b 100644
--- a/av1/decoder/decodemv.c
+++ b/av1/decoder/decodemv.c
@@ -76,7 +76,7 @@
   FRAME_CONTEXT *ec_ctx = cm->fc;
 #endif
 
-  if ((bsize != BLOCK_64X64 || mbmi->skip == 0) && read_delta_q_flag) {
+  if ((bsize != BLOCK_LARGEST || mbmi->skip == 0) && read_delta_q_flag) {
 #if !CONFIG_EC_MULTISYMBOL
     int bit = 1;
     abs = 0;