Revert "remove linter jobs for osmo-e1d and osmo-e1-firmware"

Enable the linter again, as we decided to use a repo-specific checkpatch
config in these.

This reverts commit 2c6aa82c9a8a81addd805fe211b048076e01f8c5.

Related: OS#5399
Change-Id: Ib79a20658bfae64d9b718e53e6a9393708a4e694
1 file changed