fm10k/base: add ieee1588 clock owner message support

fm10k/base: add ieee1588 clock owner message support

Add support for tx timestamp mode response message. The switch manager
should send this message whenever the owner changes or when a new port
appears. To simplify logic, treat this as full clock ownership, and call
it the CLOCK_OWNER message. Implement this as a hw->flags field, so that
base driver may use it to disable any functions which modify the clock
including Tx timestamps, frequency adjustments, and offset adjustments.
This ensures only one PEP will be handling these at a time.

Signed-off-by: Wang Xiao W <xiao.w.wang@intel.com>