* Broadcom Digital Timing Engine(DTE) based PTP clock

Required properties:
- compatible: should contain the core compatibility string
              and the SoC compatibility string. The SoC
              compatibility string is to handle SoC specific
              hardware differences.
              Core compatibility string:
                 "brcm,ptp-dte"
              SoC compatibility strings:
                 "brcm,iproc-ptp-dte" - for iproc based SoC's
- reg: address and length of the DTE block's NCO registers

Example:

ptp: ptp-dte@180af650 {
 compatible = "brcm,iproc-ptp-dte", "brcm,ptp-dte";
 reg = <0x180af650 0x10>;
};