pmdomain: sunxi: add driver for Allwinner A523's PCK-600 power controller

pmdomain: sunxi: add driver for Allwinner A523's PCK-600 power controller

Allwinner A523 family has a second power controller, named PCK-600 in
the datasheets and BSP. It is likely based on ARM's PCK-600 hardware
block, with some additional delay controls. The only documentation for
this hardware is the BSP driver. The standard registers defined in ARM's
Power Policy Unit Architecture Specification line up. Some extra delay
controls are found in the reserved range of registers.

Add a driver for this power controller. Delay control register values
and power domain names are from the BSP driver.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20250712074021.805953-4-wens@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>