dt-bindings: interrupt-controller: Add Anlogic DR1V90 ACLINT SSWI

Add SSWI support for Anlogic DR1V90 SoC, which uses Nuclei UX900 with a
TIMER unit compliant with the ACLINT specification.

Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20251021-dr1v90-basic-dt-v3-6-5478db4f664a@pigmoral.tech

Author: pigmoral

Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-sswi.yaml

@@ -30,6 +30,10 @@ properties:
           - const: thead,c900-aclint-sswi
       - items:
           - const: mips,p8700-aclint-sswi
+      - items:
+          - enum:
+              - anlogic,dr1v90-aclint-sswi
+          - const: nuclei,ux900-aclint-sswi
 
   reg:
     maxItems: 1