Add "const" to the coded_tile_data

Added "const" to the coded_tile_data in aom_tile_data to be consistent
with what is in tile_buffers.

Change-Id: I438c378701a9ef6158a04b063308a702c7b3d947

aom/aomdx.h

diff --git a/aom/aomdx.h b/aom/aomdx.h
index 6b98ac2..bada98d 100644
--- a/aom/aomdx.h
+++ b/aom/aomdx.h
@@ -68,7 +68,7 @@
   /*! Tile data size. */
   size_t coded_tile_data_size;
   /*! Tile's start address. */
-  void *coded_tile_data;
+  const void *coded_tile_data;
 } aom_tile_data;
 
 /*!\enum aom_dec_control_id

av1/av1_dx_iface.c

diff --git a/av1/av1_dx_iface.c b/av1/av1_dx_iface.c
index 682aadc..e52da46 100644
--- a/av1/av1_dx_iface.c
+++ b/av1/av1_dx_iface.c
@@ -883,7 +883,7 @@
       tile_data->coded_tile_data_size =
           pbi->tile_buffers[pbi->dec_tile_row][pbi->dec_tile_col].size;
       tile_data->coded_tile_data =
-          (void *)pbi->tile_buffers[pbi->dec_tile_row][pbi->dec_tile_col].data;
+          pbi->tile_buffers[pbi->dec_tile_row][pbi->dec_tile_col].data;
       return AOM_CODEC_OK;
     } else {
       return AOM_CODEC_ERROR;