dt-bindings: soc: sophgo: Add SG2044 top syscon device

The SG2044 top syscon device provide PLL clock control and some other
misc feature of the SoC.

Add the compatible string for SG2044 top syscon device.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250418020325.421257-2-inochiama@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>