This patch replaces the sys time stamps and timecompare code with simple
raw hardware time stamps in nanosecond resolution. The only tricky bit is
to find a PTP Hardware Clock period slower than the input clock period
and a power of two.

Compile tested only.
Signed-off-by: NRichard Cochran <richardcochran@gmail.com>
Tested-by: NBob Liu <lliubbo@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>