Heads-up: RPI FDTisation committed

[Nick Hudson <skrll%netbsd.org@localhost>]

Today I've committed a bunch of changes to convert the BCM283[567] 
support in

sys/arch/arm/broadcom to use FDT[*]. It's not perfect, but its a good 
step in the right

direction.


To the user there should be very little difference apart from

- the kernel is now built as netbsd.img (and not netbsd.bin) in the 
kernel compile objdir.

- the *.dtb files from the kernel objdir need to be on the fat filesystem

- support for dtb overlays should work[**]


The images evbearmv6hf/rpi.img and evbearmv7hf/armv7.img have been 
tested on rpi1 model b, rpi2 and rpi3.


Nick


[*] 
https://github.com/devicetree-org/devicetree-specification-released/blob/master/devicetree-specification-v0.1-20160524.pdf

[**] https://www.raspberrypi.org/documentation/configuration/device-tree.md