dt-bindings: soc: sophgo: add TOP syscon for CV18XX/SG200X series SoC

dt-bindings: soc: sophgo: add TOP syscon for CV18XX/SG200X series SoC

The Sophgo CV18XX/SG200X SoC top misc system controller provides register
access to configure related modules. It includes a usb2 phy and a dma
multiplexer.

Co-developed-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Longbin Li <looong.bin@gmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20251101014329.18439-2-looong.bin@gmail.com
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
Signed-off-by: Chen Wang <wangchen20@iscas.ac.cn>