libcamera: v4l2_videodevice: Prevent shadowing of V4L2BufferCache members

The members free, and lastUsed were not following the libcamera coding
style, and were producing a shadowed parameter on the construction.

Rename them to be marked as member variables with the _ postfix
accordingly.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2 files changed