Documentation-only change.  The 5200 device tree layout has not yet
stablized, so nobody should depend on the layout of the tree.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NSylvain Munaut <tnt@246tNt.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>