Hello,

This is the next round of fixes for -Wmissing-prototypes.  This patch:

- add missing function declarations to CPU-tdep.h
Ex, the externs in ia64-tdep.c were replaced by declarations in the 
corresponding .h file

- move function declarations to CPU-tdep.h, from config/CPU/tm-CPU.h
Ex, m68k's delta68 functions previously in tm-delta.h.
This ensures that the function declaration is always visible, and that a 
global function in CPU-tdep.c has its declaration in the corresponding 
CPU-tdep.h file.  The config/CPU/tm-CPU.h files were also updated to 
include the corresponding "CPU-tdep.h".

- where needed, create missing CPU-tdep.h files
Ex: sparc-tdep.h and ia64-aix-tdep.h being created.
This again ensures that foo.c's function declaration is in foo.h.

I'll look to commit this in a few days.

Andrew