ASoC: rt5677: rt5677_check_hotword() can be static

Fixes: 21c00e5d ("ASoC: rt5677: Enable jack detect while DSP is running")
Signed-off-by: kbuild test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20191114153304.n4pyix7qadu76tx4@4978f4969bb8Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5677.c

@@ -5307,7 +5307,7 @@ static const struct rt5677_irq_desc rt5677_irq_descs[] = {
 	},
 };
 
-bool rt5677_check_hotword(struct rt5677_priv *rt5677)
+static bool rt5677_check_hotword(struct rt5677_priv *rt5677)
 {
 	int reg_gpio;