Ford: restore radar DBC, check radarUnavailable (#27188)

selfdrive/car/ford/radar_interface.py

@@ -47,7 +47,7 @@ class RadarInterface(RadarInterfaceBase):
     self.updated_messages = set()
     self.track_id = 0
     self.radar = DBC[CP.carFingerprint]['radar']
-    if self.radar is None:
+    if self.radar is None or CP.radarUnavailable:
       self.rcp = None
     elif self.radar == RADAR.DELPHI_ESR:
       self.rcp = _create_delphi_esr_radar_can_parser()

selfdrive/car/ford/values.py

@@ -60,7 +60,7 @@ class RADAR:
   DELPHI_MRR = 'FORD_CADS'
 
 
-DBC: Dict[str, Dict[str, str]] = defaultdict(lambda: dbc_dict("ford_lincoln_base_pt", None))
+DBC: Dict[str, Dict[str, str]] = defaultdict(lambda: dbc_dict("ford_lincoln_base_pt", RADAR.DELPHI_MRR))
 
 
 @dataclass