When STA switch channel the freq0 and freq1 are channel number
and not frequency in hdd_chan_change_notify. Thus the freq0 and
freq1 validation fails in nl80211_send_chandef and thus the
channel change is not notified to supplicant.
Fix this by filling freq instead of channel in freq0 and freq1 in
hdd_chan_change_notify.
Change-Id: I03d3a2afcbb812e6da7ec2be9887dd185e754a44
CRs-Fixed: 2655979