DeviceTree for 4.13:

- vsprintf format specifier %pOF for device_node's. This will enable us
  to stop storing the full node names. Conversion of users will happen
  next cycle.

- Update documentation to point to DT specification instead of ePAPR.

- Split out graph and property functions to a separate file.

- New of-graph functions for ALSA

- Add vendor prefixes for RISC-V, Linksys, iWave Systems, Roofull,
  Itead, and BananaPi.

- Improve dtx_diff utility filename printing.
Merge branch 'dt/property-move' into dt/next