hwmon: (acpi_power_meter) Fix style issues

Fix style issues found by checkpatch.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Link: https://lore.kernel.org/r/20220509063010.3878134-2-clabbe@baylibre.com


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