mac80211_hwsim: Add channel 169 (5845 MHz)

This channel is defined in the IEEE 802.11 standard and available in
number of countries, so extend the mac80211_hwsim channel list to cover
channel 169 to enable additional testing.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>