ASoC: Allow suppression of series updates on wm_hubs devices

Some devices do not support manual updates of the DC servo.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
diff --git a/sound/soc/codecs/wm_hubs.h b/sound/soc/codecs/wm_hubs.h
index aeb5871..0d290d2 100644
--- a/sound/soc/codecs/wm_hubs.h
+++ b/sound/soc/codecs/wm_hubs.h
@@ -24,6 +24,7 @@
 	int dcs_readback_mode;
 	int hp_startup_mode;
 	int series_startup;
+	int no_series_update;
 
 	bool class_w;
 	u16 class_w_dcs;