media: v4l: async: Remove re-probing support

Remove V4L2 async re-probing support. The re-probing support has been
there to support cases where the sub-devices require resources provided by
the main driver's hardware to function, such as clocks.

Reprobing has allowed unbinding and again binding the main driver without
explicitly unbinding the sub-device drivers. This is certainly not a
common need, and the responsibility will be the user's going forward.

An alternative could have been to introduce notifier specific locks.
Considering the complexity of the re-probing and that it isn't really a
solution to a problem but a workaround, remove re-probing instead.

If there is a need to support the clock provider unregister/register cycle
while keeping the clock references in the consumers in the future, this
should be implemented in the clock framework instead, not in V4L2.

Signed-off-by: Sakari Ailus <[email protected]>
Acked-by: Hans Verkuil <[email protected]>
Acked-by: Laurent Pinchart <[email protected]>
Reviewed-by: Sebastian Reichel <[email protected]>
Acked-by: Niklas Söderlund <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

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