ASoC: sta32x: preserve coefficient RAM
The coefficient RAM must be saved in a shadow so it can be restored when the codec is powered on using regulator_bulk_enable(). Signed-off-by: NJohannes Stezenbach <js@sig21.net> Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@vger.kernel.org
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