airo: fix resume

Cisco Aironet doesn't resume properly from swsusp, because the resume
method confuses a PM_EVENT_* for a PCI power state. It thinks that it is
resuming from PCI_D1 and doesn't do the necessary initialization of the
card.

Signed-off-by: Michal Schmidt <xschmi00@stud.feec.vutbr.cz>