PM / AVS: SmartReflex: Prepare to use device tree based probing

We are currently probing smartreflex with omap_device while we are
already probing smartreflex related interconnect target module with
ti-sysc driver and dts data.

Before we can flip things on for ti-sysc, we need to prepare the
smartreflex driver a bit:

1. The smartreflex clock is really for the whole interconnect target
   module. So it may be configured at the parent device level with
   ti-sysc

2. With ti-sysc, we have the child device manage interconnect target
   module directly if pm_runtime_irq_safe() is set and there is only
   one child. In that case nobody else is going to call pm_runtime_get
   and put, so we need to add these calls to idle smartreflex properly
   after probe if not fully configured

3. With ti-sysc, the parent driver may rebind. So we want to use
   platform_driver_register() and don't want probe to be __init

Note that this patch depends on the related changes to ti-sysc driver
and omap_device probing to prevent both ti-sysc and omap_device to
try to probe smartreflex.

Cc: [email protected]
Cc: Rafael J. Wysocki <[email protected]>
Acked-by: Kevin Hilman <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

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