Merge branch 'bnxt_en-RTC'

Michael Chan says:

====================
bnxt_en: Add RTC mode for PTP

This series adds Real Time Clock (RTC) mode for PTP timestamping.  In
RTC mode, the 64-bit time value is programmed into the NIC's PTP
hardware clock (PHC).  Prior to this, the PHC is running as a free
counter.  For example, in multi-function environment, we need to run
PTP in RTC mode.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>