The PCF85063 has a configurable clock output signal. Add support for it
using in the CCF.
Signed-off-by: Michael McCormick <michael.mccormick@enatel.net>
Link: https://lore.kernel.org/r/20200124015239.24662-1-michael.mccormick@enatel.netSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>