radio-iris: Fix: fm can't be closed completely when killed abnormally.

After fm is killed abnormally,
1) we must make sure wakeup event can be received before
   10s timeout.
2) disable event should not be sent to userspace of fm.

CRs-Fixed: 967734
Change-Id: I96c1f577fce2bd5fcdd0e5b2b6bc2000d61a0bce
Signed-off-by: Mingbo Zhang <mingboz@codeaurora.org>