dt-bindings: hwmon: ti,ina2xx: use common hwmon schema

Reference common hwmon schema which allows to drop the "label" property.

Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240224-dt-bindings-hwmon-common-v2-2-b446eecf5480@linaro.org


Signed-off-by: Guenter Roeck <linux@roeck-us.net>