ASoC: Remove needless codec->dapm.bias_level assignment to SND_SOC_BIAS_OFF

This assignment is done by the snd_soc_register_codec so there is no need
to redo it in probe function of a codec driver.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/sn95031.c

@@ -826,7 +826,6 @@ static int sn95031_codec_probe(struct snd_soc_codec *codec)
 {
 	pr_debug("codec_probe called\n");
 
-	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
 	codec->dapm.idle_bias_off = 1;
 
 	/* PCM interface config

sound/soc/codecs/wm5100.c

@@ -2285,8 +2285,6 @@ static int wm5100_probe(struct snd_soc_codec *codec)
 
 	wm5100->codec = codec;
 
-	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
-
 	ret = snd_soc_codec_set_cache_io(codec, 16, 16, SND_SOC_I2C);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);

sound/soc/codecs/wm8996.c

@@ -2706,7 +2706,6 @@ static int wm8996_probe(struct snd_soc_codec *codec)
 	init_completion(&wm8996->fll_lock);
 
 	dapm->idle_bias_off = true;
-	dapm->bias_level = SND_SOC_BIAS_OFF;
 
 	ret = snd_soc_codec_set_cache_io(codec, 16, 16, SND_SOC_I2C);
 	if (ret != 0) {