ASoC: wm_hubs: Factor out DC servo readback code

It's currently only used in one place but another user will be added
shortly and there's an argument it's clearer anyway.

Also add support for readback in mode 1, though it's not currently used.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-07-23 19:49:06 +01:00
commit fae4efa23a