powerpc/44x: Update Arches dts

Sync Arches dts with latest Canyonlands version:

- Add 16k FIFO size to supported EMAC nodes
- Add next-level-cache property
- Add Crypto device node

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>