ACPI: fan: Bail out if extract package failed

Bail out if we extract the _FIF package failed, or we will end
of referencing the garbage information in fields[], the fan control
will be in mess, fix it.

Fiexes: d445571fa369 ("ACPI: fan: Optimize struct acpi_fan_fif")
Signed-off-by: Hanjun Guo <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>

drivers/acpi/fan_core.c

···
 	if (ACPI_FAILURE(status)) {
 		dev_err(&device->dev, "Invalid _FIF element\n");
 		status = -EINVAL;
+		goto err;
 	}
 
 	fan->fif.revision = fields[0];