docs for various "linux," properties in the device tree?

[Kumar Gala]

In search our code base we have the following set of properties:

"linux,boot-cpu"
"linux,boot-display"
"linux,bootx-addr"
"linux,bootx-depth"
"linux,bootx-height"
"linux,bootx-linebytes"
"linux,bootx-width"
"linux,crashkernel-base"
"linux,crashkernel-size"
"linux,drconf-usable-memory"
"linux,htab-base"
"linux,htab-size"
"linux,initrd-end"
"linux,initrd-start"
"linux,iommu-force-on"
"linux,iommu-off"
"linux,kernel-end"
"linux,memory-limit"
"linux,opened"
"linux,pci-assign-all-buses"
"linux,pci-probe-only"
"linux,phandle"
"linux,rtas-base"
"linux,rtas-entry"
"linux,stdout-package"
"linux,stdout-path"
"linux,tce-alloc-end"
"linux,tce-alloc-start"
"linux,tce-base"
"linux,tce-size"
"linux,unit_address"
"linux,usable-memory"

Some of these are spec'd in booting-with-of.  what about the others?

- k