PERFORCE change 171338 for review

[Nathan Whitehorn]

Since this is the same as the OFW interface, or is supposed to be, would 
it make sense to make this be MI in /sys/dev/ofw, attaching with a low 
priority to any device with a phandle and OF children?
-Nathan

Rafal Jaworowski wrote:
> http://p4web.freebsd.org/chv.cgi?CH=171338
>
> Change 171338 by raj at raj_fdt on 2009/12/03 16:57:28
>
> 	Initial version of the fdtbus driver.
> 	
> 	It handles IRQ and MEM resources. Based on the device tree top-level
> 	entities are instantiated as newbus children on the fdtbus.
> 	
> 	The mpc85xx directory is temporary, it will be something generic once
> 	we are done with FDT bringup for PowerPC and move on to ARM.
>
> Affected files ...
>
> .. //depot/projects/fdt/sys/conf/files.powerpc#4 edit
> .. //depot/projects/fdt/sys/powerpc/mpc85xx/fdtbus.c#1 add
>
> Differences ...
>
> ==== //depot/projects/fdt/sys/conf/files.powerpc#4 (text+ko) ====
>
> @@ -119,6 +119,7 @@
>  powerpc/mpc85xx/atpic.c		optional	mpc85xx isa
>  powerpc/mpc85xx/ds1553_bus_lbc.c	optional	ds1553
>  powerpc/mpc85xx/ds1553_core.c	optional	ds1553
> +powerpc/mpc85xx/fdtbus.c	optional	fdt
>  powerpc/mpc85xx/i2c.c		optional	iicbus mpc85xx
>  powerpc/mpc85xx/isa.c		optional	mpc85xx isa
>  powerpc/mpc85xx/lbc.c		optional	mpc85xx
>