wil6210: Enable run-time PM for all power management states

wil6210_resume/wil6210_suspend/wil6210_pm_notify function is
used for all power management states and not only for
hibernate/sleep states.

Change-Id: I86b6a34cb23705fc17b7cb6e55bbe62aae63ebcf
Signed-off-by: Alexei Avshalom Lazar <ailizaro@codeaurora.org>