dt-bindings: Add INA228 to ina2xx devicetree bindings

Add the ina228 to ina2xx bindings.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jonas Rebmann <jre@pengutronix.de>
Link: https://lore.kernel.org/r/20250718-ina228-v2-2-227feb62f709@pengutronix.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: jonrebm

Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml

@@ -25,6 +25,7 @@ properties:
       - ti,ina219
       - ti,ina220
       - ti,ina226
+      - ti,ina228
       - ti,ina230
       - ti,ina231
       - ti,ina233
@@ -107,6 +108,7 @@ allOf:
               - ti,ina219
               - ti,ina220
               - ti,ina226
+              - ti,ina228
               - ti,ina230
               - ti,ina231
               - ti,ina237