ASoC: fsl_spdif: fix TXCLK_DF mask

According to RM SPDIF TXCLK_DF mask is 7-bit wide.
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_spdif.h

@@ -152,7 +152,7 @@ enum spdif_gainsel {
 #define STC_TXCLK_ALL_EN_MASK		(1 << STC_TXCLK_ALL_EN_OFFSET)
 #define STC_TXCLK_ALL_EN		(1 << STC_TXCLK_ALL_EN_OFFSET)
 #define STC_TXCLK_DF_OFFSET		0
-#define STC_TXCLK_DF_MASK		(0x7ff << STC_TXCLK_DF_OFFSET)
+#define STC_TXCLK_DF_MASK		(0x7f << STC_TXCLK_DF_OFFSET)
 #define STC_TXCLK_DF(x)		((((x) - 1) << STC_TXCLK_DF_OFFSET) & STC_TXCLK_DF_MASK)
 #define STC_TXCLK_SRC_MAX		8