wifi: cfg80211: pass net_device to .set_monitor_channel

Preparation for allowing multiple monitor interfaces with different channels
on a multi-radio wiphy.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://patch.msgid.link/35fa652dbfebf93343f8b9a08fdef0467a2a02dc.1728462320.git-series.nbd@nbd.name


Signed-off-by: Johannes Berg <johannes.berg@intel.com>