ASoC: fsl_spdif: fix sysclk_df type

According to RM SPDIF STC SYSCLK_DF field is 9-bit wide, values
being in 0..511 range. Use a proper type to handle sysclk_df.
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_spdif.c

@@ -96,7 +96,7 @@ struct fsl_spdif_priv {
 	bool dpll_locked;
 	u32 txrate[SPDIF_TXRATE_MAX];
 	u8 txclk_df[SPDIF_TXRATE_MAX];
-	u8 sysclk_df[SPDIF_TXRATE_MAX];
+	u16 sysclk_df[SPDIF_TXRATE_MAX];
 	u8 txclk_src[SPDIF_TXRATE_MAX];
 	u8 rxclk_src;
 	struct clk *txclk[SPDIF_TXRATE_MAX];
@@ -376,7 +376,8 @@ static int spdif_set_sample_rate(struct snd_pcm_substream *substream,
 	struct platform_device *pdev = spdif_priv->pdev;
 	unsigned long csfs = 0;
 	u32 stc, mask, rate;
-	u8 clk, txclk_df, sysclk_df;
+	u16 sysclk_df;
+	u8 clk, txclk_df;
 	int ret;
 
 	switch (sample_rate) {
@@ -1109,8 +1110,9 @@ static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
 	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;
-	u32 txclk_df, sysclk_df, arate;
+	u32 arate;
+	u16 sysclk_dfmin, sysclk_dfmax, sysclk_df;
+	u8 txclk_df;
 
 	/* The sysclk has an extra divisor [2, 512] */
 	sysclk_dfmin = is_sysclk ? 2 : 1;