CSSI has another CPU board, similar to the CMPC885 board
that get plugged on the two base boards MCR3000_2G and MIAE.
That CPU board is called CMPCPRO because it has a MPC8321E CPU,
also known as Power QUICC II PRO.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>