ARM: dts: renesas: Group tuples in operating-points properties

To improve human readability and enable automatic validation, the tuples
in the "operating-points" properties of CPU nodes should be grouped.

Fix this by grouping the tuples of these properties using angle brackets
in the DTS files for all Renesas SoCs that don't already do so.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20191231141642.31609-1-geert+renesas@glider.be