ARM: OMAP: omap_device: remove omap_device_parent
Currently all omap_devices are forced to have the dummy device
'omap_device_parent' as a parent. This was used to distinguish
omap_devices from "normal" platform_devices in the OMAP PM core code.
Now that we implement the PM core using PM domains, this is no longer
needed, and is removed.
This also frees up omap_devices to have a more complex parent/child
relationships that model actual device relationships.
The only in-tree user of omap_device_parent was the OMAP PM layer to
handle lost-context count for omap_devices. That is now converted to
use the presence of the omap_device_pm_domain instead.
Signed-off-by: NKevin Hilman <khilman@ti.com>
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