net: ethernet: Fix Intel Axxia FEMAC driver for kernel 5.10

commit aead2d57 from
https://github.com/axxia/linux-yocto.git

 v5.10/standard/axxia-dev/base.

Fix support for kernel 5.10 on Intel Axxia FEMAC driver.

Signed-off-by: Mikael Beckius <mikael.beckius@windriver.com>
Signed-off-by: Daniel Dragomir <Daniel.Dragomir@windriver.com>
Signed-off-by: John Jacques <john.jacques@intel.com>
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>