power: supply: bq24735: allow polling even if there is no ac-detect gpio

It is possible to verify AC adapter presence via a register read, without
any physical connection to the ACOK pin on the charger. Allow this.
Signed-off-by: Peter Rosin <peda@axentia.se>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

Documentation/devicetree/bindings/power/supply/ti,bq24735.txt

@@ -27,8 +27,8 @@ Optional properties :
  - ti,external-control : Indicates that the charger is configured externally
    and that the host should not attempt to enable/disable charging or set the
    charge voltage/current.
- - poll-interval : In case 'interrupts' is not specified, poll AC presence
-   on the ti,ac-detect-gpios GPIO with this interval (milliseconds).
+ - poll-interval : In case 'interrupts' is not specified, poll AC adapter
+   presence with this interval (milliseconds).
 
 Example:
 

drivers/power/supply/bq24735-charger.c

@@ -468,7 +468,7 @@ static int bq24735_charger_probe(struct i2c_client *client,
 				client->irq, ret);
 			return ret;
 		}
-	} else if (charger->status_gpio) {
+	} else {
 		ret = device_property_read_u32(&client->dev, "poll-interval",
 					       &charger->poll_interval);
 		if (ret)