Merge branch 'net-ptp-use-common-defines-for-ptp-message-types-in-further-drivers'

Christian Eggers says:

====================
net: ptp: use common defines for PTP message types in further drivers

This series replaces further driver internal enumeration / uses of magic
numbers with the newly introduced PTP_MSGTYPE_* defines.
====================

Link: https://lore.kernel.org/r/20201124074418.2609-1-ceggers@arri.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>