Fix tile config related comments

Change-Id: Ifadf4c97e54650d44b28f789ade68158270969dd
diff --git a/av1/common/av1_common_int.h b/av1/common/av1_common_int.h
index 06979a5..f3f2823 100644
--- a/av1/common/av1_common_int.h
+++ b/av1/common/av1_common_int.h
@@ -461,11 +461,11 @@
    */
   int min_log2_rows;
   /*!
-   * Min num of tile columns possible based on frame width.
+   * Max num of tile columns possible based on frame width.
    */
   int max_log2_cols;
   /*!
-   * Max num of tile columns possible based on frame width.
+   * Max num of tile rows possible based on frame height.
    */
   int max_log2_rows;
   /*!