[PATCH] More Coccinelli cleanups

Hi list,

Since my previous Coccinelle cleanup patches have gained positive
feedback I decided to try some more.

This time I wrote my own spatches.

patch 0001 turns (a - b == 0) into (a == b) and similarly with !=
patch 0002 applies the same to operators >, >=, <, <=

I'm well aware that there's a point where code cleanups defeat their
purpose and become a burden. So this will probably be my last one,
I'll go to doing productive things instead. :)

Regards,
Marti