Add support for Nios-II EPCS Controller core. * Patch by Scott McNutt, 20 Oct 2004: Nios-II cleanups: - Add sysid command (Nios-II only). - Locate default exception trampoline at proper offset. - Implement I/O routines (readb, writeb, etc) - Implement do_bootm_linux
- Add support for Altera Nios-II processors. - Add support for Psyent PCI-5441 board. - Add support for Psyent PK1C20 board.