This removes unneeded kernel version switches from the targets after
kernel 4.19 has been dropped.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
It adjusts the code to upstream changes from the commit 3c1bcc8614db
("net: ethernet: Convert phydev advertize and supported from u32 to link
mode")
Signed-off-by: Mathias Kresin <dev@kresin.me>