arm: dts: Revert cpr voltage override removals

* The device processors will work just fine with the lower voltage
  limits.

Revert "arm: dts: Remove cpr voltage overwrites for j5 devices"

This reverts commit 21e15911.

Revert "arm: dts: Remove cpr voltage overwrites for gte devices"

This reverts commit ef4c80b8.

Revert "arm: dts: Remove cpr voltage overwrites for fortuna devices"

This reverts commit 4f7f5c03.

 Date:      Thu May 11 15:43:28 2017 -0400
 interactive rebase in progress; onto b34aec7e9b63
 Last commands done (4 commands done):
    squash c6404cb6a6e3 Revert "arm: dts: Remove cpr voltage overwrites for gte devices"
    squash 7a195b08a2ad Revert "arm: dts: Remove cpr voltage overwrites for fortuna devices"