mac80211: fix monitor-only injection

git-svn-id: svn://svn.openwrt.org/openwrt@35760 3c298f89-4303-0410-b956-a3cf2f4a3e73
mac80211: fix monitor mode channel reporting

git-svn-id: svn://svn.openwrt.org/openwrt@35761 3c298f89-4303-0410-b956-a3cf2f4a3e73