ASoC: rsnd: core: make some arrays static const, makes object smaller

Don't populate arrays on the stack but instead them static const.
Makes the object code smaller by 48 bytes.

Before:
   text    data     bss     dec     hex filename
  20938     916     104   21958    55c6 ./sound/soc/sh/rcar/core.o

After:
   text    data     bss     dec     hex filename
  20890     916     104   21910    5596 ./sound/soc/sh/rcar/core.o

gcc version 11.1.0)
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87tujkwydx.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/core.c

@@ -426,19 +426,19 @@ u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 
 u32 rsnd_get_busif_shift(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
 {
-	enum rsnd_mod_type playback_mods[] = {
+	static const enum rsnd_mod_type playback_mods[] = {
 		RSND_MOD_SRC,
 		RSND_MOD_CMD,
 		RSND_MOD_SSIU,
 	};
-	enum rsnd_mod_type capture_mods[] = {
+	static const enum rsnd_mod_type capture_mods[] = {
 		RSND_MOD_CMD,
 		RSND_MOD_SRC,
 		RSND_MOD_SSIU,
 	};
 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 	struct rsnd_mod *tmod = NULL;
-	enum rsnd_mod_type *mods =
+	const enum rsnd_mod_type *mods =
 		rsnd_io_is_play(io) ?
 		playback_mods : capture_mods;
 	int i;