From: Stefan Sørensen <redacted>
Date: Wed, 30 Aug 2017 08:50:55 +0200

There is no reason to handle SIOC[GS]HWTSTAMP and return -EOPNOTSUPP when
CPTS is disabled, so just pass them on to the phy. This will allow PTP
timestamping on a capable phy by disabling CPTS.

Signed-off-by: Stefan Sørensen <redacted>

It should not be required to disable a Kconfig option just to get PHY
timestamping to work properly.

Rather, if the CPTS code returns -EOPNOTSUPP we should try to
fallthrough to the PHY library based methods.

Thanks.