ASoC: soc.h: add asoc_link_to_cpu/codec/platform() macro

We shouldn't use dai_link->cpus/codecs/platforms directly,
because these are array now to supporting multi CPU/Codec/Platform.
This patch adds asoc_link_to_xxx() macro for it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/874kh3aopc.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -716,20 +716,38 @@ struct snd_soc_dai_link {
 	struct snd_soc_dobj dobj; /* For topology */
 #endif
 };
+
+static inline struct snd_soc_dai_link_component*
+asoc_link_to_cpu(struct snd_soc_dai_link *link, int n) {
+	return &(link)->cpus[n];
+}
+
+static inline struct snd_soc_dai_link_component*
+asoc_link_to_codec(struct snd_soc_dai_link *link, int n) {
+	return &(link)->codecs[n];
+}
+
+static inline struct snd_soc_dai_link_component*
+asoc_link_to_platform(struct snd_soc_dai_link *link, int n) {
+	return &(link)->platforms[n];
+}
+
 #define for_each_link_codecs(link, i, codec)				\
 	for ((i) = 0;							\
-	     ((i) < link->num_codecs) && ((codec) = &link->codecs[i]);	\
+	     ((i) < link->num_codecs) &&				\
+		     ((codec) = asoc_link_to_codec(link, i));		\
 	     (i)++)
 
 #define for_each_link_platforms(link, i, platform)			\
 	for ((i) = 0;							\
 	     ((i) < link->num_platforms) &&				\
-	     ((platform) = &link->platforms[i]);			\
+		     ((platform) = asoc_link_to_platform(link, i));	\
 	     (i)++)
 
 #define for_each_link_cpus(link, i, cpu)				\
 	for ((i) = 0;							\
-	     ((i) < link->num_cpus) && ((cpu) = &link->cpus[i]);	\
+	     ((i) < link->num_cpus) &&					\
+		     ((cpu) = asoc_link_to_cpu(link, i));		\
 	     (i)++)
 
 /*