power: supply: cpcap-battery: Fix platform_get_irq_byname's error checking

The platform_get_irq_byname() function returns -1 if an error occurs.
zero or positive number on success. platform_get_irq_byname() error
checking for zero is not correct.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

drivers/power/supply/cpcap-battery.c

@@ -586,8 +586,8 @@ static int cpcap_battery_init_irq(struct platform_device *pdev,
 	int irq, error;
 
 	irq = platform_get_irq_byname(pdev, name);
-	if (!irq)
-		return -ENODEV;
+	if (irq < 0)
+		return irq;
 
 	error = devm_request_threaded_irq(ddata->dev, irq, NULL,
 					  cpcap_battery_irq_thread,