wpa_driver_nl80211_driver_cmd: improve failed cmd error log

Change-Id: Idd5af4e7db6c2813bce2d6d7e9a33f2b60f7ea5e
wpa_supplicant_lib: Sync to wpa_supplicant b834952

Change-Id: I4afae325ee6f10b60f54ff64482eeccf0f7cc204