amd-xgbe: Add hardware timestamp support

This patch adds support for Tx and Rx hardware timestamping.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc Documentation/devicetree/bindings/net/amd-xgbe.txt
Simple merge

diff --cc drivers/net/ethernet/amd/Kconfig
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/Makefile
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/xgbe-common.h
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/xgbe-desc.c
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/xgbe-dev.c
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/xgbe-drv.c
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/xgbe-main.c
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
Simple merge

diff --cc drivers/net/ethernet/amd/xgbe/xgbe.h
Simple merge