ASoC: fsl_spdif: make const arrays rate static

Don't populate the const arrays rate on the stack, instead make them
static. Makes the object code smaller by 220 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  24385	   9776	    128	  34289	   85f1	sound/soc/fsl/fsl_spdif.o

After:
   text	   data	    bss	    dec	    hex	filename
  24005	   9936	    128	  34069	   8515	sound/soc/fsl/fsl_spdif.o

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_spdif.c

@@ -1110,7 +1110,7 @@ static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
 				struct clk *clk, u64 savesub,
 				enum spdif_txrate index, bool round)
 {
-	const u32 rate[] = { 32000, 44100, 48000, 96000, 192000 };
+	static const u32 rate[] = { 32000, 44100, 48000, 96000, 192000 };
 	bool is_sysclk = clk_is_match(clk, spdif_priv->sysclk);
 	u64 rate_ideal, rate_actual, sub;
 	u32 sysclk_dfmin, sysclk_dfmax;
@@ -1169,7 +1169,7 @@ out:
 static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv,
 				enum spdif_txrate index)
 {
-	const u32 rate[] = { 32000, 44100, 48000, 96000, 192000 };
+	static const u32 rate[] = { 32000, 44100, 48000, 96000, 192000 };
 	struct platform_device *pdev = spdif_priv->pdev;
 	struct device *dev = &pdev->dev;
 	u64 savesub = 100000, ret;