hwmon: (oxp-sensors) Fix pwm reading

PWM reading is only 1 register long.
Signed-off-by: Joaquín Ignacio Aramendía <samsagax@gmail.com>
Link: https://lore.kernel.org/r/20221128185206.212022-1-samsagax@gmail.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/oxp-sensors.c

@@ -158,7 +158,7 @@ static int oxp_platform_read(struct device *dev, enum hwmon_sensor_types type,
 	case hwmon_pwm:
 		switch (attr) {
 		case hwmon_pwm_input:
-			ret = read_from_ec(OXP_SENSOR_PWM_REG, 2, val);
+			ret = read_from_ec(OXP_SENSOR_PWM_REG, 1, val);
 			if (ret)
 				return ret;
 			if (board == oxp_mini_amd)