dt-bindings: interrupt-controller: Update Loongson HTVEC description

Loongson HTVEC support 8 parents interrupts in maximum, so update the
maxItems description.

Signed-off-by: Huacai Chen <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Reviewed-by: Jiaxun Yang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: chenhuacai

Documentation/devicetree/bindings/interrupt-controller/loongson,htvec.yaml

@@ -22,8 +22,8 @@ properties:
 
   interrupts:
     minItems: 1
-    maxItems: 4
-    description: Four parent interrupts that receive chained interrupts.
+    maxItems: 8
+    description: Eight parent interrupts that receive chained interrupts.
 
   interrupt-controller: true