dt-bindings: gpio: aspeed,ast2400-gpio: Support ast2700

The AST2700 is the 7th generation SoC from Aspeed, featuring two GPIO
controllers: one with 12 GPIO pins and another with 216 GPIO pins.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20241008081450.1490955-7-billy_tsai@aspeedtech.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml

@@ -15,6 +15,7 @@ properties:
       - aspeed,ast2400-gpio
       - aspeed,ast2500-gpio
       - aspeed,ast2600-gpio
+      - aspeed,ast2700-gpio
 
   reg:
     maxItems: 1
@@ -25,7 +26,7 @@ properties:
 
   gpio-controller: true
   gpio-line-names:
-    minItems: 36
+    minItems: 12
     maxItems: 232
 
   gpio-ranges: true
@@ -42,7 +43,7 @@ properties:
     const: 2
 
   ngpios:
-    minimum: 36
+    minimum: 12
     maximum: 232
 
 required:
@@ -93,6 +94,20 @@ allOf:
           enum: [ 36, 208 ]
       required:
         - ngpios
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: aspeed,ast2700-gpio
+    then:
+      properties:
+        gpio-line-names:
+          minItems: 12
+          maxItems: 216
+        ngpios:
+          enum: [ 12, 216 ]
+      required:
+        - ngpios
 
 additionalProperties: false