[PATCH net-next v3 0/3] net: ptp: introduce common defines for PTP message types

[Christian Eggers]

This series introduces commen defines for PTP event messages. Driver
internal defines are removed and some uses of magic numbers are replaced
by the new defines.

Changes v2 --> v3
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- extend commit description for ptp_ines (Jacob Keller)

Changes v1 --> v2
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- use defines instead of an enum (Richard Cochran)
- no changes necessary for dp63640
- add cover message (Vladimir Oltean)