ASoC: wm8978: Cleanup manual bias level transitions

Since the ASoC core now takes care of setting the bias level to
SND_SOC_BIAS_OFF when removing the CODEC there is no need to do it manually
anymore either.

The manual transition to SND_SOC_BIAS_STANDBY at the end of CODEC probe()
can also be removed as the core will automatically do this after the CODEC
has been probed.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm8978.c

@@ -991,21 +991,11 @@ static int wm8978_probe(struct snd_soc_codec *codec)
 	for (i = 0; i < ARRAY_SIZE(update_reg); i++)
 		snd_soc_update_bits(codec, update_reg[i], 0x100, 0x100);
 
-	wm8978_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
-	return 0;
-}
-
-/* power down chip */
-static int wm8978_remove(struct snd_soc_codec *codec)
-{
-	wm8978_set_bias_level(codec, SND_SOC_BIAS_OFF);
 	return 0;
 }
 
 static struct snd_soc_codec_driver soc_codec_dev_wm8978 = {
 	.probe =	wm8978_probe,
-	.remove =	wm8978_remove,
 	.suspend =	wm8978_suspend,
 	.resume =	wm8978_resume,
 	.set_bias_level = wm8978_set_bias_level,