params: Deprecate old-style constructors; update most SimObject constructors.

SimObjects not yet updated:
- Process and subclasses
- BaseCPU and subclasses

The SimObject(const std::string &name) constructor was removed.  Subclasses
that still rely on that behavior must call the parent initializer as
  : SimObject(makeParams(name))

--HG--
extra : convert_revision : d6faddde76e7c3361ebdbd0a7b372a40941c12ed

src/python/swig/sim_object.i

@@ -53,7 +53,7 @@ class SimObject {
     void resume();
     void switchOut();
     void takeOverFrom(BaseCPU *cpu);
-    SimObject(const std::string &_name);
+    SimObject(const SimObjectParams *p);
 };
 
 int connectPorts(SimObject *o1, const std::string &name1, int i1,