* sys/src/Makefile: misc
* sys/src/9/pc/mp.c: moved
* kernel/cpus/386/mp.c: mv
* kernel/buses/386/uarti8250.c: rename struct, avoid dupes
* kernel/devices/keyboard/386/kbd.c: use extern, avoid dupes
* skip_list.txt: better for kernel, almost no error
* windows/rio/xfid.c: more enum at toplevel, cg prefers that
* windows/rio/dat.h: FidRio struct, avoid dupe
* utilities/: use static for some file local globals, avoid dupes
* compilers/cc/cc.h: rename some struct, avoid dupes
* debuggers/acid/acid.h: avoid dupe
* generators/lex/ldefs.h: avoid dupe
* lib_graphics/libmemdraw/draw.c: rename struct, avoid dupe
* generators/yacc/yacc.c: use static