xgbe: Use netlink extack to report errors to ethtool

xgbe: Use netlink extack to report errors to ethtool

Upgrade XGBE driver to report errors via netlink extack instead
of netdev_error so ethtool userspace can be aware of failures.

Signed-off-by: Vishal Badole <Vishal.Badole@amd.com>
Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Link: https://patch.msgid.link/20260114080357.1778132-1-Raju.Rangoju@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>