ASoC: Allow idle_bias_off to be specified in CODEC drivers

If devices can unconditionally support idle_bias_off let them flag it in
their driver structure.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index ae93aa8..f8f985a 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -956,6 +956,8 @@
 		snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
 					  driver->num_dapm_widgets);
 
+	codec->dapm.idle_bias_off = driver->idle_bias_off;
+
 	if (driver->probe) {
 		ret = driver->probe(codec);
 		if (ret < 0) {