Re: [v2,7/7] gianfar: add support for wake-on-packet

The ->gfar_set_wol() code doesn't validate that the requested settings
do not try to set bits outside of priv->wol_supported.

Just remove the check against "!priv->wol_supported" and replace it
with something like "!(wol->wolopts & ~priv->wol_supported)"