staging: vc04_services: Drop bcm2835-camera driver

staging: vc04_services: Drop bcm2835-camera driver

The bcm2835-camera driver is replaced by the V4L2 bcm2835-unicam driver
that is already upstream. So drop it from staging.

This also simplifies destaging of VCHIQ MMAL, by reducing the users of
the MMAL API (this driver is one of them).

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jai Luthra <jai.luthra@ideasonboard.com>
Acked-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://patch.msgid.link/20251029-vchiq-destage-v3-1-da8d6c83c2c5@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>