Code simplification

Change-Id: I2a9e16bf337a91219fc2aa10937d3cd1dfa67a71

av1/encoder/rdopt.c

@@ -3953,8 +3953,8 @@ static void select_inter_block_yrd(const AV1_COMP *cpi, MACROBLOCK *x,
   if (is_cost_valid) {
     const struct macroblockd_plane *const pd = &xd->plane[0];
     const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
-    const int mi_width = block_size_wide[plane_bsize] >> tx_size_wide_log2[0];
-    const int mi_height = block_size_high[plane_bsize] >> tx_size_high_log2[0];
+    const int mi_width = mi_size_wide[plane_bsize];
+    const int mi_height = mi_size_high[plane_bsize];
     const TX_SIZE max_tx_size = get_max_rect_tx_size(plane_bsize, 1);
     const int bh = tx_size_high_unit[max_tx_size];
     const int bw = tx_size_wide_unit[max_tx_size];
@@ -4201,8 +4201,8 @@ int inter_block_yrd(const AV1_COMP *cpi, MACROBLOCK *x, RD_STATS *rd_stats,
   if (is_cost_valid) {
     const struct macroblockd_plane *const pd = &xd->plane[0];
     const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
-    const int mi_width = block_size_wide[plane_bsize] >> tx_size_wide_log2[0];
-    const int mi_height = block_size_high[plane_bsize] >> tx_size_high_log2[0];
+    const int mi_width = mi_size_wide[plane_bsize];
+    const int mi_height = mi_size_high[plane_bsize];
     const TX_SIZE max_tx_size = get_vartx_max_txsize(
         xd, plane_bsize, pd->subsampling_x || pd->subsampling_y);
     const int bh = tx_size_high_unit[max_tx_size];