nl80211: Skip interface down/up when setting MAC address

nl80211: Skip interface down/up when setting MAC address

A driver may not support setting MAC address when interface is UP, so
wpa_supplicant used to always sets the interface down for MAC address
change.

Try to change the address first without setting the interface down and
then fall back to DOWN/set addr/UP if the first attempt failed. This can
reduce the interface setup time for time-critical use cases.

Signed-off-by: Jouni Malinen <quic_jouni@quicinc.com>