fix initdram function for utx8245 board

* Patch by Markus Pietrek, 14 Apr 2004:
  use ATAG_INITRD2 instead of deprecated ATAG_INITRD tag

* Patch by Reinhard Meyer, 18 Apr 2004:
  provide the IDE Reset Function for EMK 5200 boards

* Patch by Masami Komiya, 12 Apr 2004:
  fix pci_hose_write_config_{byte,word}_via_dword problems