mfd: arizona: Register MICVDD supply first to ensure no retries

Not strictly required as probe deferral will take care of everything but
it makes boot a little smoother.

Reported-by: Ryo Tsutsui <Ryo.Tsutsui@wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>