Merge branch 'PTP-driver-refactoring-for-SJA1105-DSA'

Vladimir Oltean says:

====================
PTP driver refactoring for SJA1105 DSA

This series creates a better separation between the driver core and the
PTP portion. Therefore, users who are not interested in PTP can get a
simpler and smaller driver by compiling it out.

This is in preparation for further patches: SPI transfer timestamping,
synchronizing the hardware clock (as opposed to keeping it
free-running), PPS input/output, etc.
====================

Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>