Added ppc_sys device and system definitions for PowerQUICC I devices.
This will allow drivers for PQI to be proper platform device drivers. 
Currently sys section contains only MPC885 and MPC866. Identification 
should be done with identify_ppc_sys_by_name call, with board-specific 
"name" string passed, since PQI do not have any register that could 
identify the SOC.

Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Marcelo Tosatti <marcelo.tosatti@cyclades.com>