tree aa0345e5d6a3ab724bfb8a8b7a3cb7667754c512
parent d082402e2174314e87131771d048925b2245b74c
author Masahiro Yamada <yamada.masahiro@socionext.com> 1565452382 +0900
committer Masahiro Yamada <yamada.masahiro@socionext.com> 1566389038 +0900

kbuild: do not descend to ./Kbuild when cleaning

'make clean' descends into ./Kbuild, but does not clean anything
since everything is added to no-clean-files.

There is no need to descend to ./Kbuild in the first place.
We can drop the no-clean-files assignment.

With this, there is no more user of no-clean-files. I will keep it
for a while to see whether a new user will appear.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>