Refactor to use block_size_wide/high[] consistently

Replace the computation of block size in pixels with lookup table
directly.

Change-Id: I39589b2bc1d20372969ff5ad0f60639e64a19b41
diff --git a/av1/common/common_data.h b/av1/common/common_data.h
index 1e6b619..c51df89 100644
--- a/av1/common/common_data.h
+++ b/av1/common/common_data.h
@@ -45,9 +45,11 @@
 static const uint8_t block_size_wide[BLOCK_SIZES] = {
   4, 4, 8, 8, 8, 16, 16, 16, 32, 32, 32, 64, 64, IF_EXT_PARTITION(64, 128, 128)
 };
+
 static const uint8_t block_size_high[BLOCK_SIZES] = {
   4, 8, 4, 8, 16, 8, 16, 32, 16, 32, 64, 32, 64, IF_EXT_PARTITION(128, 64, 128)
 };
+
 static const uint8_t num_4x4_blocks_wide_lookup[BLOCK_SIZES] = {
   1, 1, 2, 2, 2, 4, 4, 4, 8, 8, 8, 16, 16, IF_EXT_PARTITION(16, 32, 32)
 };