dt-bindings: clock, reset: Add support for rk3576

Add clock and reset ID defines for rk3576.

Compared to the downstream bindings written by Elaine, this uses
continous gapless IDs starting at 0. Thus all numbers are
different between downstream and upstream, but names are kept
exactly the same.

Also add documentation for the rk3576 CRU core.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/0102019199a76766-f3a2b53f-d063-458b-b0d1-dfbc2ea1893c-000000@eu-west-1.amazonses.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>