Comment # 3 on bug 1190738 from Takashi Iwai

Agreed, the separate build allows more flexible ways of adding/removing the
modules outside the lengthy and complex kernel packaging process, and that's
the exact purpose.

Containing the kernel changelog in the package file sounds feasible.
I wanted to put the old changelog from the previous SP into a file instead of
keeping the full log, in anyway, and it will follow in that line.