Align tile_data to 32 byte boundary

Change-Id: I3cd7a4598535023b97f2df772959805a9b13dd62

av1/encoder/encodeframe.c

diff --git a/av1/encoder/encodeframe.c b/av1/encoder/encodeframe.c
index 0521157..e0d255a 100644
--- a/av1/encoder/encodeframe.c
+++ b/av1/encoder/encodeframe.c
@@ -4894,8 +4894,9 @@
 
   if (cpi->tile_data == NULL || cpi->allocated_tiles < tile_cols * tile_rows) {
     if (cpi->tile_data != NULL) aom_free(cpi->tile_data);
-    CHECK_MEM_ERROR(cm, cpi->tile_data, aom_malloc(tile_cols * tile_rows *
-                                                   sizeof(*cpi->tile_data)));
+    CHECK_MEM_ERROR(
+        cm, cpi->tile_data,
+        aom_memalign(32, tile_cols * tile_rows * sizeof(*cpi->tile_data)));
     cpi->allocated_tiles = tile_cols * tile_rows;
 
     for (tile_row = 0; tile_row < tile_rows; ++tile_row)