[PATCH] ppc32: fix CPCI405 board support

Hi,

this patch brings the CPCI405 board support up to date and fixes several 
outstanding issues:

      -add bios_fixup()
      -enable RTC only when CONFIG_GEN_RTC defined
      -corrected CompactPCI interrupt map
      -added cpci405_early_serial_map for correct UART clocking
      -removed unused code

Matthias

Signed-off-by: Matthias Fuchs <redacted>