When PCI devices are initialized, we check whether they support PCI PM
caps and set the device can_wakeup flag if so.  However, some devices
may have platform provided wakeup events rather than PCI PME signals, so
we need to set can_wakeup in that case too.  Doing so should allow
wakeups from many more devices, especially on cost constrained systems.
Reported-by: NAlan Stern <stern@rowland.harvard.edu>
Tested-by: NJoseph Chan <JosephChan@via.com.tw>
Acked-by: N"Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>