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cxgb4: Add HW timesptamp support for RX
Adds support for ethtool get time stamp ioctl, which is used by
tcpdump to get the supported time stamp types
eg: tcpdump -i eth5 -J
Time stamp types for eth5 (use option -j to set):
host (Host)
adapter_unsynced (Adapter, not synced with system time)
Adds support for adapter unsynced mode, by adding SIOCSHWTSTAMP support
in driver.
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>