cleaning up initialize()

- standardisded on a single context argument
- removed Device.init() no longer necessary as initilize now
  automatically gets propagated up the hierarchy. Renamed the existing
  use of it to "initilize".
- related pylint cleanup.

wlauto/modules/cpufreq.py

@@ -28,7 +28,7 @@ class CpufreqModule(Module):
     """
     capabilities = ['cpufreq']
 
-    def initialize(self):
+    def initialize(self, context):
         # pylint: disable=W0201
         CpufreqModule._available_governors = {}
         CpufreqModule._available_governor_tunables = {}