set loop_filter_across_tiles_enabled flag to 1 in default case

Change-Id: I907976619a433a92d671c5cce25f3e8806638e80

aom/aomcx.h

@@ -296,7 +296,7 @@ enum aome_enc_control_id {
    *            0 = disable loop filter across tile boundary
    *            1 = enable loop filter across tile boundary
    *
-   * By default, the value is 0, i.e. disable loop filter across tile boundary.
+   * By default, the value is 1, i.e. enable loop filter across tile boundary.
    *
    * Supported in codecs: AV1
    */

av1/av1_cx_iface.c

@@ -91,7 +91,7 @@ static struct av1_extracfg default_extra_cfg = {
   0,  // tile_rows
 #endif  // CONFIG_EXT_TILE
 #if CONFIG_LOOPFILTERING_ACROSS_TILES
-  0,              // loop_filter_across_tiles_enabled
+  1,              // loop_filter_across_tiles_enabled
 #endif            // CONFIG_LOOPFILTERING_ACROSS_TILES
   7,              // arnr_max_frames
   5,              // arnr_strength