Several Makefile cleanups for consistency between packages.

Removed PKG_INSTALL as it's implied by CMAKE_INSTALL.

Removed InstallDev for the same reason.

Removed upstreamed patches.

Fixed license information.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

The CONTRIBUTING.md requests an (or multiple) SPDX identifier for GPL
licenses. But a lot of packages did use a different, non-SPDX style with a
"+" at the end instead of "-or-later".

Signed-off-by: Sven Eckelmann <sven@narfation.org>

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

this is needed for frr (frrouting.org)

Signed-off-by: Lucian Cristian <lucian.cristian@gmail.com>

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

PR includes switch to codeload tarballs.

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

Signed-off-by: Matija Amidzic <matija.amidzic@sartura.hr>

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

Patch includes updates to packages:
netopeer2: update to version 0.4.0
sysrepo: update to 0.7.0
libnetconf2: update to 0.9.15
libyang: update to 0.13.46

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

Signed-off-by: Antonio Paunovic <antonio.paunovic@sartura.hr>

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>