ASoC: rt5659: rt5659_intel_hd_header_probe_setup() can be static

Fixes: 041e74b7 ("ASoC: rt5659: Add the support of Intel HDA Header")
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5659.c

@@ -4038,7 +4038,7 @@ static void rt5659_calibrate(struct rt5659_priv *rt5659)
 	regmap_write(rt5659->regmap, RT5659_HP_CHARGE_PUMP_1, 0x0c16);
 }
 
-void rt5659_intel_hd_header_probe_setup(struct rt5659_priv *rt5659)
+static void rt5659_intel_hd_header_probe_setup(struct rt5659_priv *rt5659)
 {
 	int value;