ASoC: simple-card-util: remove dai_link compatible code for platform

Now no simple/audio cards are using legacy dai_link style for platform.
Let's remove compatible code.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/simple-card-utils.c

@@ -376,13 +376,9 @@ EXPORT_SYMBOL_GPL(asoc_simple_card_init_dai);
 int asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link)
 {
 	/* Assumes platform == cpu */
-	if (dai_link->platform) {
-		if (!dai_link->platform->of_node)
-			dai_link->platform->of_node = dai_link->cpu_of_node;
-	} else {
-		if (!dai_link->platform_of_node)
-			dai_link->platform_of_node = dai_link->cpu_of_node;
-	}
+	if (!dai_link->platform->of_node)
+		dai_link->platform->of_node = dai_link->cpu_of_node;
+
 	return 0;
 
 }