ASoC: rsnd: SSI/SSIU use rsnd_get_slot_extend() to check TDM

Current SSI/SSIU are using rsnd_get_slot_runtime() to check TDM,
but using rsnd_get_slot_extend() is more sane.
This patch fix it up

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/ssi.c

@@ -267,7 +267,7 @@ static int rsnd_ssi_config_init(struct rsnd_ssi *ssi,
 	u32 wsr;
 	int is_tdm;
 
-	is_tdm = (rsnd_get_slot_runtime(io) >= 6) ? 1 : 0;
+	is_tdm = (rsnd_get_slot_extend(io) >= 6) ? 1 : 0;
 
 	/*
 	 * always use 32bit system word.

sound/soc/sh/rcar/ssiu.c

@@ -78,7 +78,7 @@ static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
 	if (ret < 0)
 		return ret;
 
-	if (rsnd_get_slot_runtime(io) >= 6) {
+	if (rsnd_get_slot_extend(io) >= 6) {
 		/*
 		 * TDM Extend Mode
 		 * see