If 2 roaming disable commands are sent by wpa supplicant back to back,
2nd won't send RSO STOP to target since RSO STOPPED already, and
disable_lfr_event can't be completed any more since no RSO event from
target until 2s timeout, wpa_supplicant thread and nl80211 are blocked in
wlan_hdd_cfg80211_set_fast_roaming for 2s too.
Fix:
If roaming is stopped by wpa_supplicant already and to be disabled again,
return QDF_STATUS_E_ALREADY in sme_config_fast_roaming.
Change-Id: I7d15a4d4bd8e13ff410a7023f80b418eea435fcc
CRs-Fixed: 2733945
aa74dc19cf