Merge branch 'Marvell-PP2-2-PTP-support'

Russell King says:

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Marvell PP2.2 PTP support

This series adds PTP support for PP2.2 hardware to the mvpp2 driver.
Tested on the Macchiatobin eth1 port.

Note that on the Macchiatobin, eth0 uses a separate TAI block from
eth1, and there is no hardware synchronisation between the two.
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Signed-off-by: David S. Miller <davem@davemloft.net>