[Stylecheck] Adapted checkpatch.pl to coding style.
[Stylecheck] We actually prefer __attribute__.
[Stylecheck] Accept defines using lower case x.

It is considerede CamelCase but we do accept those as it makes the code
more readable knowing that the lower case x is a placeholder for a
number or letter in the define and the define applies to all "banks",
"buffers", "subsystems".
[Stylecheck] Also accept the usage of the x defines.
[Style] A small coding style fixing session.