core: New OS for IBM POWER support

This change introduces an operating system which contains the
characteristics of the IBM POWER architecture. It includes also
some information about disk interfaces that will be used in
other following patches.

Change-Id: I35298c31cfa55f212c2d8b4016ee3019d7b28c40
Signed-off-by: Vitor de Lima <vitor.lima@eldorado.org.br>
Signed-off-by: Leonardo Bianconi <leonardo.bianconi@eldorado.org.br>
Signed-off-by: Gustavo Pedrosa <gustavo.pedrosa@eldorado.org.br>