ppc4xx: Add GDsys CompactCenter board support.
Board support for the Guntermann & Drunck CompactCenter and DevCon-Center. Based on the AMCC Canyonlands board support by Stefan Roese. Signed-off-by:Dirk Eibach <eibach@gdsys.de> Signed-off-by:
Stefan Roese <sr@denx.de>