qcacld-3.0: Set negotiated auth type to OPEN for SAE-pmk cache case

wpa_supplicant sends connect request with open auth and pmkid
when PMK caching is enabled and if it has PMK/PMKID cached.
Set rsn_auth_type to SAE when connect request has AKM as SAE
auth_type as open.
Set negotiated auth type to OPEN in SAE with pmk cache case as
open authentication going to happen.

Change-Id: I9ccc419bd439702041840b0194bb0622d7856255
CRs-Fixed: 2467813