WPA: Extend the wpa_pmk_to_ptk() function to also derive KDK

WPA: Extend the wpa_pmk_to_ptk() function to also derive KDK

Extend the wpa_pmk_to_ptk() to also derive Key Derivation
Key (KDK), which can later be used for secure LTF measurements.

Update the wpa_supplicant and hostapd configuration and the
corresponding WPA and WPA Auth state machine, to allow enabling of KDK
derivation. For now, use a testing parameter to control whether KDK is
derived.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>