LinuxKPI: netdevice add attach/detach skeleton functions
For the moment add skeleton functions for netif_device_attach/detach()
needed by rtw8[89] v6.17.
Approved by: re (cperciva)
(cherry picked from commit 5ea941a4fbfd1ba2483e47fe30ed6713fe912284)
(cherry picked from commit 4bdd0e51d7113aadcbfba9a76d72d8e924c5dcdf)