[POWERPC] 85xx: Cleaned up platform dts files

* Fixed up top level compatible property for all boards
* Removed explicit linux,phandle usage. Use references and labels now
* Fixed phy-phandles for TSEC3/4 in mpc8548cds.dts

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
6 files changed