rtl8366s is used only by dlink_dir-825-b1 and the netgear_wndr family
(wndr3700, wndr3700-v2, wndr3800ch, wndr3800.dts, wndrmac-v1,
wndrmac-v2).
Not tested in real hardware.
With rtl8366rb, rtl8366s, rtl8367 as modules, rtl8366_smi can also be a
loadable module. This change was tested with tl-wr2543-v1.
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>