* The coding format is too messy, reformat to improve readability
and get closer to Linux kernel coding style.
* While at it, update .clang-format file to linux-mainline state.
* Much cleaner code, although setenforce is not used anymore
* Guard is_ksu_transition only for 4.19 and under.
Signed-off-by: rsuntk <rsuntk@yukiprjkt.my.id>