This patch does some shifting around of OF support on 8xx.

Signed-off-by: Bryan O'Donoghue <bodonoghue@codehermit.ie>

Based on patch by Mike Frysinger, 20 Jun 2006

Modifications are based on the linux kernel approach and
support two use cases:

  1) Add O= to the make command line
  'make O=/tmp/build all'

  2) Set environement variable BUILD_DIR to point to the desired location
  'export BUILD_DIR=/tmp/build'
  'make'

The second approach can also be used with a MAKEALL script
'export BUILD_DIR=/tmp/build'
'./MAKEALL'

Command line 'O=' setting overrides BUILD_DIR environent variable.

When none of the above methods is used the local build is performed and
the object files are placed in the source directory.

  see doc/README.MPC866 for details;
  implement workaround for "SIU4" and "SIU9" silicon bugs on MPC866;
  calculate CPU clock frequency from PLL register values.

* Add support for 128 MB RAM on TQM8xxL/M modules

  - rewrite of the S3C24X0 register definitions stuff
  - "driver" for the built-in S3C24X0 RTC

* Patches by Yuli Barcohen, 12 Jun 2003:
  - Add MII support and Ethernet PHY initialization for MPC8260ADS board
  - Fix incorrect SIUMCR initialisation caused by wrong Hard Reset
    configuration word supplied by FPGA on some MPC8260ADS boards

* Patch by Pantelis Antoniou, 10 Jun 2003:
  Unify status LED interface

  - Added support for custom keyboards, initialized by defining a
    board-specific drv_keyboard_init as well as defining CONFIG_KEYBOARD .
  - Added support for the RBC823 board.
  - cpu/mpc8xx/lcd.c now automatically calculates the
    Horizontal Pixel Count field.

* Fix alignment problem in BOOTP (dhcp_leasetime option)
  [pointed out by Nicolas Lacressonnire, 2 Jun 2003]

* Patch by Mark Rakes, 14 May 2003:
  add support for Intel e1000 gig cards.

* Patch by Nye Liu, 3 Jun 2003:
  fix critical typo in MAMR definition (include/mpc8xx.h)

* Fix requirement to align U-Boot image on 16 kB boundaries on PPC.

* Patch by Klaus Heydeck, 2 Jun 2003
  Minor changes for KUP4K configuration