kernel: cleanup, undefinedDefOfDecl, dead proto, etc
kernel: more cleanup
* pad.txt:
Revert "* kernel/devices/screen/: remove deadcode"

This reverts commit e692ee509873d3e0a4e04501841bfd626e99804a.
* kernel/devices/screen/386/screen.c: revert, works again!
I broke rio, there was some refreshing issues