rown <broonie@opensource.wolfsonmicro.com> 1335896467 +0100

ASoC: wm_hubs: Cache multiple DCS offsets

Rather than invalidating the cached DCS value every time the headphone
gain changes store multiple values, indexed by gain. This allows the
optimisation we get from the cache to take effect more often.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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