[RFC PATCH 0/2] Allow inheritance of private controls

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Devices with a simple video pipeline may want to inherit private controls
of sub-devices and expose them to the video node instead of v4l-subdev
nodes (which may be inhibit anyway by the driver).

Add support for this.

A typical real-life example of this is a PCI capture card with just a single
video receiver sub-device. Creating v4l-subdev nodes for this is overkill
since it is clear which control belongs to which subdev.

Regards,

	Hans

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