net: dpaa2-mac: use lynx_pcs_create_fwnode()

commit  5a255075e4b6814c1cfa5781b15e2992924cdfa7 from
https://github.com/nxp-imx/linux-imx lf-6.1.y

Use lynx_pcs_create_fwnode() to create a lynx PCS from a fwnode handle.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
(cherry picked from commit 595fa763

)
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>