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

The AST2700 is the 7th generation SoC from Aspeed, featuring two SGPIO
master controllers: both with 256 serial inputs and outputs.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20260123-upstream_sgpio-v2-5-69cfd1631400@aspeedtech.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Author: billy-tsai

Documentation/devicetree/bindings/gpio/aspeed,sgpio.yaml

@@ -10,7 +10,8 @@ maintainers:
   - Andrew Jeffery <andrew@aj.id.au>
 
 description:
-  This SGPIO controller is for ASPEED AST2400, AST2500 and AST2600 SoC,
+  This SGPIO controller is for ASPEED AST2400, AST2500, AST2600 and AST2700 SoC,
+  AST2700 have two sgpio master both with 256 pins,
   AST2600 have two sgpio master one with 128 pins another one with 80 pins,
   AST2500/AST2400 have one sgpio master with 80 pins. Each of the Serial
   GPIO pins can be programmed to support the following options
@@ -27,6 +28,7 @@ properties:
       - aspeed,ast2400-sgpio
       - aspeed,ast2500-sgpio
       - aspeed,ast2600-sgpiom
+      - aspeed,ast2700-sgpiom
 
   reg:
     maxItems: 1