Split G80 from Hyundai Genesis (#1502)

Previous commit moved G80 from G90 grouping to Hyundai Genesis grouping.
Bug found as minSteerSpeed is 0 for G80 but 60 for Hyundai Genesis.
Taking @pd0wm recommendation and  ungrouping G80 to its own.

selfdrive/car/hyundai/interface.py

@@ -67,7 +67,7 @@ class CarInterface(CarInterfaceBase):
       ret.lateralTuning.pid.kiBP, ret.lateralTuning.pid.kpBP = [[0.], [0.]]
       ret.lateralTuning.pid.kpV, ret.lateralTuning.pid.kiV = [[0.25], [0.05]]
       ret.minSteerSpeed = 32 * CV.MPH_TO_MS
-    elif candidate in [CAR.HYUNDAI_GENESIS, CAR.GENESIS_G80]:
+    elif candidate == CAR.HYUNDAI_GENESIS:
       ret.lateralTuning.pid.kf = 0.00005
       ret.mass = 2060. + STD_CARGO_KG
       ret.wheelbase = 3.01
@@ -75,6 +75,13 @@ class CarInterface(CarInterfaceBase):
       ret.lateralTuning.pid.kiBP, ret.lateralTuning.pid.kpBP = [[0.], [0.]]
       ret.lateralTuning.pid.kpV, ret.lateralTuning.pid.kiV = [[0.16], [0.01]]
       ret.minSteerSpeed = 60 * CV.KPH_TO_MS
+    elif candidate == CAR.GENESIS_G80:
+      ret.lateralTuning.pid.kf = 0.00005
+      ret.mass = 2060. + STD_CARGO_KG
+      ret.wheelbase = 3.01
+      ret.steerRatio = 16.5
+      ret.lateralTuning.pid.kiBP, ret.lateralTuning.pid.kpBP = [[0.], [0.]]
+      ret.lateralTuning.pid.kpV, ret.lateralTuning.pid.kiV = [[0.16], [0.01]]
     elif candidate == CAR.GENESIS_G90:
       ret.mass = 2200
       ret.wheelbase = 3.15