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>
diff --git a/drivers/power/bq20z75.c b/drivers/power/bq20z75.c
index e1adc0e..9c5e5be 100644
--- a/drivers/power/bq20z75.c
+++ b/drivers/power/bq20z75.c
@@ -702,6 +702,8 @@
 
 	INIT_DELAYED_WORK(&bq20z75_device->work, bq20z75_delayed_work);
 
+	bq20z75_device->enable_detection = true;
+
 	return 0;
 
 exit_psupply: