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: d445571f

 ("ACPI: fan: Optimize struct acpi_fan_fif")
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>