x86: refactor psr: remove L3 CAT/CDP codes.

x86: refactor psr: remove L3 CAT/CDP codes.

The current cache allocation codes in psr.c do not consider
future features addition and are not friendly to extend.

To make psr.c be more flexible to add new features and fulfill
the program principle, open for extension but closed for
modification, we have to refactor the psr.c:
1. Analyze cache allocation features and abstract general data
   structures.
2. Analyze the init and all other functions flow, abstract all
   steps that different features may have different implementations.
   Make these steps be callback functions and register feature
   specific fuctions. Then, the main processes will not be changed
   when introducing a new feature.

Because the quantity of refactor codes is big and the logics are
changed a lot, it will cause reviewers confused if just change
old codes. Reviewers have to understand both old codes and new
implementations. After review iterations from V1 to V3, Jan has
proposed to remove all old cache allocation codes firstly, then
implement new codes step by step. This will help to make codes
be more easily reviewable.

There is no construction without destruction. So, this patch
removes all current L3 CAT/CDP codes in psr.c. The following
patches will introduce the new mechanism.

Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>