dt-bindings: eeprom: at24: add Belling BL24C16A

Add binding for Belling BL24C16A, which is compatible with Atmel 24C16.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230710165228.105983-3-sebastian.reichel@collabora.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/eeprom/at24.yaml

@@ -101,6 +101,9 @@ properties:
                   pattern: spd$
       # These are special cases that don't conform to the above pattern.
       # Each requires a standard at24 model as fallback.
+      - items:
+          - const: belling,bl24c16a
+          - const: atmel,24c16
       - items:
           - enum:
               - rohm,br24g01