power: supply: max17040: adjust thermal channel scaling

[ Upstream commit d055f51731744243b244aafb1720f793a5b61f7b ]

IIO thermal channel is in millidegree while power supply framework expects
decidegree values. Adjust scaling to get correct readings.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Link: https://lore.kernel.org/r/20250430060239.12085-2-clamor95@gmail.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/power/supply/max17040_battery.c

@@ -410,8 +410,9 @@ static int max17040_get_property(struct power_supply *psy,
 		if (!chip->channel_temp)
 			return -ENODATA;
 
-		iio_read_channel_processed_scale(chip->channel_temp,
+		iio_read_channel_processed(chip->channel_temp, &val->intval);
-						 &val->intval, 10);
+		val->intval /= 100; /* Convert from milli- to deci-degree */
+
 		break;
 	default:
 		return -EINVAL;