PCI/PM: Resume device before shutdown

PCI/PM: Resume device before shutdown

Some actions during shutdown need device to be in D0 state, such as
MSI shutdown etc, so resume device before shutdown.

Without this patch, a device may not be enumerated after a kexec
because the corresponding bridge is not in D0, so that
configuration space of the device is not accessible.

Signed-off-by: Huang Ying <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
CC: [email protected]		# v3.6+