ASoC: ak4613: cares Simple-Audio-Card case for TDM

Renesas is the only user of ak4613 on upstream for now, and
commit f28dbaa9 ("ASoC: ak4613: add TDM256 support")
added TDM256 support. Renesas tested part of it, because of
board connection.

It was assuming ak4613 is probed via Audio-Graph-Card, but it
might be probed via Simple-Audio-Card either.
It will indicates WARNING in such case. This patch fixup it.
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/87h74v29f7.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/ak4613.c

@@ -868,10 +868,12 @@ static void ak4613_parse_of(struct ak4613_priv *priv,
 
 	/*
 	 * connected STDI
+	 * TDM support is assuming it is probed via Audio-Graph-Card style here.
+	 * Default is SDTIx1 if it was probed via Simple-Audio-Card for now.
 	 */
 	sdti_num = of_graph_get_endpoint_count(np);
-	if (WARN_ON((sdti_num > 3) || (sdti_num < 1)))
-		return;
+	if ((sdti_num >= SDTx_MAX) || (sdti_num < 1))
+		sdti_num = 1;
 
 	AK4613_CONFIG_SDTI_set(priv, sdti_num);
 }