ASoC: ak4642: make arrays fs_list and ps_list static const

Don't populate the arrays fs_list and ps_list on the stack but make
them static const.  Makes the object code smaller:

Before:
   text    data     bss     dec     hex filename
  12084    4888      64   17036    428c sound/soc/codecs/ak4642.o

After:
   text    data     bss     dec     hex filename
  11883    5032      64   16979    4253 sound/soc/codecs/ak4642.o
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/codecs/ak4642.c

@@ -433,7 +433,7 @@ static int ak4642_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 static int ak4642_set_mcko(struct snd_soc_codec *codec,
 			   u32 frequency)
 {
-	u32 fs_list[] = {
+	static const u32 fs_list[] = {
 		[0] = 8000,
 		[1] = 12000,
 		[2] = 16000,
@@ -447,7 +447,7 @@ static int ak4642_set_mcko(struct snd_soc_codec *codec,
 		[14] = 29400,
 		[15] = 44100,
 	};
-	u32 ps_list[] = {
+	static const u32 ps_list[] = {
 		[0] = 256,
 		[1] = 128,
 		[2] = 64,