net: micrel: Add PHC support for lan8841

commit 9496f60efcaba8727e039c092d1f473bb1e46cab from
https://github.com/linux4microchip/linux.git

 linux-6.1-mchp+fpga

Add support for PHC and timestamping operations for the lan8841 PHY.
PTP 1-step and 2-step modes are supported, over Ethernet and UDP both
ipv4 and ipv6.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Saravanan.K.S <saravanan.kadambathursubramaniyam@windriver.com>