add large memory support for MPC8266ADS board

* Patch by Richard Woodruff, 19 June 03:
  - Enabled standard u-boot device abstraction for ARM
  - Enabled console device for ARM
  - Initilized bi_baudrate for ARM

* Patch by Bill Hargen, 23 Apr 2003:
  fix byte order for 824x I2C addresses (write op)