dt-bindings: clock: sophgo: Add clock controller of SG2000 series SoC

SG2000 series SoC has the same clock as CV1810 series, but the clock
related to A53 is functional in SG2000 series. So a new compatible
string is needed for the new SoC.

Add definition for the clock controller of the SG2000 series SoC.

Link: https://github.com/sophgo/sophgo-doc/releases/tag/sg2000-datasheet-v1.0-alphaAcked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
Link: https://lore.kernel.org/r/IA1PR20MB495368F185E018767CC6714ABB262@IA1PR20MB4953.namprd20.prod.outlook.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/sophgo,cv1800-clk.yaml

@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/clock/sophgo,cv1800-clk.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Sophgo CV1800 Series Clock Controller
+title: Sophgo CV1800/SG2000 Series Clock Controller
 
 maintainers:
   - Inochi Amaoto <inochiama@outlook.com>
@@ -14,6 +14,7 @@ properties:
     enum:
       - sophgo,cv1800-clk
       - sophgo,cv1810-clk
+      - sophgo,sg2000-clk
 
   reg:
     maxItems: 1