ASoC: rt5640: Power down LDO while suspended
If we have control over the LDO then disable it during suspend; the device is already being put into reset so will be non-functional over suspend anyway and this will save a small amount of power. Signed-off-by: NMark Brown <broonie@linaro.org> Tested-by: NStephen Warren <swarren@nvidia.com>
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