hwmon: (f71882fg) Check for hwmon powerdown state

More F8000 prep work. Take over the checking if the hwmon part is not
powered down from the standalone f8000 driver.

This check is valid for all supported models.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

drivers/hwmon/f71882fg.c

@@ -1500,6 +1500,11 @@ static int __devinit f71882fg_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, data);
 
 	start_reg = f71882fg_read8(data, F71882FG_REG_START);
+	if (start_reg & 0x04) {
+		dev_warn(&pdev->dev, "Hardware monitor is powered down\n");
+		err = -ENODEV;
+		goto exit_free;
+	}
 	if (!(start_reg & 0x03)) {
 		dev_warn(&pdev->dev, "Hardware monitoring not activated\n");
 		err = -ENODEV;