bq20z75: Enable detection after registering

Need to enable detection, which is also blocking the unit conversion logic
after registering the power_supply.
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

drivers/power/bq20z75.c

@@ -702,6 +702,8 @@ static int __devinit bq20z75_probe(struct i2c_client *client,
 
 	INIT_DELAYED_WORK(&bq20z75_device->work, bq20z75_delayed_work);
 
+	bq20z75_device->enable_detection = true;
+
 	return 0;
 
 exit_psupply: