leds-ss4200: Check pci_enable_device return

pci_enable_result is defined using the __must_check macro but
leds-ss4200 is not checking the return value.
Signed-off-by: NJavier Martinez Canillas <martinez.javier@gmail.com>
Signed-off-by: NDave Hansen <dave@sr71.net>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

drivers/leds/leds-ss4200.c

@@ -344,10 +344,14 @@ static struct pci_dev *nas_gpio_pci_dev;
 static int __devinit ich7_lpc_probe(struct pci_dev *dev,
 				    const struct pci_device_id *id)
 {
-	int status = 0;
+	int status;
 	u32 gc = 0;
 
-	pci_enable_device(dev);
+	status = pci_enable_device(dev);
+	if (status) {
+		dev_err(&dev->dev, "pci_enable_device failed\n");
+		return;
+	}
 
 	nas_gpio_pci_dev = dev;
 	status = pci_read_config_dword(dev, PMBASE, &g_pm_io_base);