Poor-mans ftrace with spatch

Will add a printk to the entry and exit of every function you spatch.
Doesn't work with multicore, so only use it on core 0.

Also, tokenize didn't have visibility of kdebug.h.
Removes excessive breaks for spatch

Cocci can't handle parsing these files due to 'control flow' issues.  No
change in the actual functioning.

Note: one of our ancient LWIP TCP files also has this problem, and it's
not clear how to fix it.  Since we're probably going to delete those
soon, I'm ignoring it.