ASoC: rsnd: core.c: indicate warning if strange TDM width was set

Current rsnd silently uses default TDM width if it was strange
settings. It is difficult to notice about it.
This patch indicates warning for it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87lel6ksqn.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/core.c

@@ -828,6 +828,13 @@ static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
 		break;
 	default:
 		/* use default */
+		/*
+		 * Indicate warning if DT has "dai-tdm-slot-width"
+		 * but the value was not expected.
+		 */
+		if (slot_width)
+			dev_warn(dev, "unsupported TDM slot width (%d), force to use default 32\n",
+				 slot_width);
 		slot_width = 32;
 	}