Merge branch 'net-fix-sw-timestamping'

Ivan Khoronzhuk says:

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net: fix sw timestamping for non PTP packets

This series contains several corrections connected with timestamping
for cpsw and netcp drivers based on same cpts module.

Based on net/next
====================

Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>