drivers: sensor: ds18b20: Fix temperature calculation for ds18s20

The millionths value is calculated incorrectly.
The sensor has a precision of 0.5 which is 500000 millionths, but
there is an extra zero in the code. This fix removes the extra zero.

Signed-off-by: Sašo Domadenik <[email protected]>

Author: sasodoma

drivers/sensor/maxim/ds18b20/ds18b20.c

@@ -89,7 +89,7 @@ static inline void ds18b20_temperature_from_raw(const struct device *dev,
 
 	if (cfg->chip == type_ds18s20) {
 		val->val1 = temp / 2;
-		val->val2 = (temp % 2) * 5000000;
+		val->val2 = (temp % 2) * 500000;
 	} else {
 		val->val1 = temp / 16;
 		val->val2 = (temp % 16) * 1000000 / 16;