Change I542e5afe832619f8c088220cc4456aa7fe4416fd ("qcacld-3.0: Route
the legacy NAN commands through NAN component") removed the usage of
typedef tNanRequest. Since the typedef is obsolete, remove it.
Change-Id: I10e243b4e6998e69027c2f0d5f829cd2a6b27c92
CRs-Fixed: 2379059