- let more drivers that don't compile depend on BROKEN
- MTD_BLKMTD is fixed, remove the dependency on BROKEN
- let all drivers that don't compile on SMP (due to cli/sti usage)
  depend on a BROKEN_ON_SMP that is only defined if !SMP || BROKEN
- #include interrupt.h for dummy cli/sti/... in two files to fix the
  UP compilation of these files

I marked only drivers that are broken for a long time and where I don't 
know about existing fixes with BROKEN or BROKEN_ON_SMP.