Replace the dmabuf import patch with the two series that it grow into
during upstreaming, shipping in the next libcamera release. This will:
1. Improve performance for all devices using the GPU-ISP, including
those not able to use dmabuf import.
2. Simplify debugging.
3. Ensure the patches get enough testing before the upstream release.
While on it backport some additional patches:
1. A follow-up patch adding the last required step to allow dmabuf import
for input buffers to work in almost all cases *if* the V4L2 driver
handles custom bytesperline requests for bayer formats.
2. A small logging fix
3. A fix for bad bottom lines of pixels seen on some devices. This is
the only patch with visual impact - and a quite desirable one.
4. A patch to log the used driver for easier debugging.
This leaves us with only two downstream patches, both specific to the
PinePhone (OG).
Finally, add a "py3-$pkgname-pyc:pyc" subpackage in order to stay in
sync with the upstream package.
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8650>
