Add Meta: to Metadata devices

Metadata devices usually companion "real" devices. In order to
distinguish them properly, add the Meta: prefix to their names.

Also, add a unique suffix to all the uvc devices, to multisensor cameras
do not show the same names for all their devices (IR, RBG....).

v3:

- Add the meta logic to the core

v2: uvc: Restore old vdev name

To: Mauro Carvalho Chehab <mchehab@kernel.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: linux-media@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>

---
Ricardo Ribalda (3):
      media: v4l2-dev.c: Add Meta: to the name of metadata devices
      media: Documentation/driver-api: Document device name
      media: uvcvideo: Add a unique suffix to camera names

 Documentation/driver-api/media/v4l2-dev.rst | 4 +++-
 drivers/media/usb/uvc/uvc_driver.c          | 3 ++-
 drivers/media/v4l2-core/v4l2-dev.c          | 9 +++++++++
 3 files changed, 14 insertions(+), 2 deletions(-)
---
base-commit: 521a547ced6477c54b4b0cc206000406c221b4d6
change-id: 20220920-resend-meta-435c30209235

Best regards,