Use TrueHD codec in TS instead of MLP.

Manually Cherry-picked by Jean-Baptiste Kempf <jb@videolan.org>

modules/demux/ts.c

@@ -3627,7 +3627,7 @@ static void PMTSetupEsHDMV( demux_t *p_demux, ts_pid_t *pid,
 
     case 0x83: /* TrueHD AC3 */
         p_fmt->i_cat = AUDIO_ES;
-        p_fmt->i_codec = VLC_FOURCC( 'm', 'l', 'p', ' ' );
+        p_fmt->i_codec = VLC_FOURCC( 't', 'r', 'h', 'd' );
         break;
 
     case 0x84: /* E-AC3 */