rtc: rv3032: constify pointers to hwmon_channel_info

Statically allocated array of pointers to hwmon_channel_info can be made
const for safety.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230511175609.282191-4-krzysztof.kozlowski@linaro.org


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>