ASoC: arizona: Tidy up SYNCCLK selection and cache values
This patch caches the current SYNCCLK settings in the arizona_fll struct and uses these to simplify the code which determines which source should be used for the REFCLK and SYNCCLK inputs. Signed-off-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
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