ASoC: Intel: Skylake: Make local functions static

Some functions are local to the source and do not need to be in global
scope, so make them static.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c
index 4d2136c..ca5dc2b 100644
--- a/sound/soc/intel/skylake/skl-nhlt.c
+++ b/sound/soc/intel/skylake/skl-nhlt.c
@@ -269,7 +269,7 @@
  * stores all possible rates supported in a rate table for the corresponding
  * sclk/sclkfs.
  */
-void skl_get_ssp_clks(struct skl *skl, struct skl_ssp_clk *ssp_clks,
+static void skl_get_ssp_clks(struct skl *skl, struct skl_ssp_clk *ssp_clks,
 				struct nhlt_fmt *fmt, u8 id)
 {
 	struct skl_i2s_config_blob_legacy *i2s_config;
@@ -360,7 +360,7 @@
 	}
 }
 
-void skl_get_mclk(struct skl *skl, struct skl_ssp_clk *mclk,
+static void skl_get_mclk(struct skl *skl, struct skl_ssp_clk *mclk,
 				struct nhlt_fmt *fmt, u8 id)
 {
 	struct skl_i2s_config_blob_legacy *i2s_config;