[NORMATIVE]Fix has_top_right() for 128x* blocks

Before this fix, have_top_right for the complete right half of the
sb128 is disabled.

Borg test results don't show any compression changes. Probably 128x*
blocks are very rarely chosen for intra modes.

BUG=aomedia:1309

Change-Id: I66a0573c029e7e3d440014842b5d031190d89f89

av1/common/reconintra.c

diff --git a/av1/common/reconintra.c b/av1/common/reconintra.c
index b9d266f..72f3744 100644
--- a/av1/common/reconintra.c
+++ b/av1/common/reconintra.c
@@ -273,9 +273,11 @@
 
   if (row_off > 0) {  // Just need to check if enough pixels on the right.
 #if CONFIG_EXT_PARTITION
-    if (col_off + top_right_count_unit >=
-        (block_size_wide[BLOCK_64X64] >> (tx_size_wide_log2[0] + ss_x)))
-      return 0;
+    if (block_size_wide[bsize] > block_size_wide[BLOCK_64X64]) {
+      const int plane_bw_unit_64 = mi_size_wide[BLOCK_64X64] >> ss_x;
+      const int col_off_64 = col_off % plane_bw_unit_64;
+      return col_off_64 + top_right_count_unit < plane_bw_unit_64;
+    }
 #endif
     return col_off + top_right_count_unit < plane_bw_unit;
   } else {