[gpio] Fix CI for L variant devices

src/modm/platform/gpio/sam/module.lb

@@ -48,6 +48,12 @@ def build(env):
                 "function": signal["function"].capitalize(),
                 "name": signal["name"].capitalize(),
             })
+            # This is a hack for L variant devices, which have a Ac without instance *and*
+            # a Ac with instance 1. Why???
+            if (device.identifier.get("variant") == "l"
+                    and signal["peripheral"] == "Ac"
+                    and (not "instance" in signal or signal["instance"] == "")):
+                signal["instance"] = "0"
             signal["full_name"] = signal["peripheral"]
             peripheral = peripherals.setdefault(signal["peripheral"], dict())
             if "instance" in signal: