mac80211: mark sdata as OPERATING_GMODE in mesh

Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>
mac80211: return correct mandatory rates when operating in 2.4GHz band

Currently, the function ieee80211_mandatory_rates() doesn't get 802.11g
mandatory rates. This patch will make the function to return correct mandatory
rates when operating in 2.4GHz band.

Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>