The device_driver suspend/resume methods are no longer used.  Instead,
the bus_type contains the suspend/resume methods.  Fix the SA1111 bus
support for this change.

We place the probe/remove/suspend/resume methods inside struct
sa1111_driver and call them from the SA1111 bus driver (ie, how
Pat wants this stuff done.)

We leave the parent bus device suspend/resume methods in the device
driver until power management for platform devices works again.
However, we adjust these methods so they run only once, like the
other PM methods.