hwmon: (max1619) Mask valid alarm bits

Bit 0, 5, and 6 in the status register are reserved and, if set, do not
indicate an alarm. Bit 7 is the 'busy' bit and also does not indicate
an alarm. Mask the non-alarm bits to avoid reporting them to userspace.

Cc: Tzung-Bi Shih <tzungbi@kernel.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/max1619.c

@@ -112,6 +112,7 @@ static struct max1619_data *max1619_update_device(struct device *dev)
 		config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG);
 		if (!(config & 0x20))
 			data->alarms ^= 0x02;
+		data->alarms &= 0x1e;
 
 		data->last_updated = jiffies;
 		data->valid = true;