The kobject core no longer references a subsystem directly through a kobject,
instead using the kobject's dominant kset to reference the subsystem. The 
registrants of kobjects have been fixed up. 

To aid in this process, a few helpers were introdcuced: 

- kobj_set_kset_s(obj,subsys)
- kset_set_kset_s(obj,subsys)
- subsys_set_kset(obj,subsys)

that set the kset ptr of embedded kobjects for objects that have different
embedded types. See include/linux/kobject.h for more description and usage.


struct subsystem::kobj is also removed, relying solely on a subsystem's
embedded kset for hierarchy information.  Since this requires modification
of the subsystem declarations, a helper macro has been defined:

decl_subsys(name,type)

which initializes the name and ktype fields of the subsystem's embedded
kset. All the subsystem declarations have been fixed up.