ASoC: arizona: Move set of OUTDIV in to arizona_apply_fll

Since we know in arizona_apply_fll if we are setting the sync or ref
path there is no need to set the outdiv seperately anymore. This patch
moves this from arizona_enable_fll to arizona_apply_fll.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>