dt-bindings: power: Add A523 PPU and PCK600 power controllers

dt-bindings: power: Add A523 PPU and PCK600 power controllers

The A523 PPU is likely the same kind of hardware seen on previous SoCs.

The A523 PCK600, as the name suggests, is likely a customized version
of ARM's PCK-600 power controller. Comparing the BSP driver against
ARM's PPU datasheet shows that the basic registers line up, but
Allwinner's hardware has some additional delay controls in the reserved
register range. As such it is likely not fully compatible with the
standard ARM version.

Document A523 PPU and PCK600 compatibles.

Also reorder the compatible string entries so they are grouped and
ordered by family first, then by SoC model.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20250712074021.805953-2-wens@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>