ASoC: wm_hubs: Factor out DC servo readback code
authorMark Brown <broonie@opensource.wolfsonmicro.com>
Mon, 23 Jul 2012 18:49:06 +0000 (19:49 +0100)
committerMark Brown <broonie@opensource.wolfsonmicro.com>
Fri, 3 Aug 2012 22:03:57 +0000 (23:03 +0100)
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>

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