RFA: Remove D10V-specific code from arch-independent modules

[Andrew Cagney]

> The convert to/from virtual/raw register functions are borderline 
>> deprecated.  They are being replaced by the much simpler functions 
>> gdbarch_register_{read,write}.  If, for the d10v, those conversion 
>> functions are being eliminated then I'd just delete them.
> 
> 
> The D10V no longer has any convertible registers, so those functions
> certainly should never be called.  I just assumed I'd get a gdbarch
> error if I didn't provide some value for them.  Are you saying I can
> just delete the set_gdbarch_* calls altogether, and the dummy
> functions they register?  (I guess since the corresponding macros are
> optional, that would make sense...)


Yes it can all just go.  Those functions are strictly optional.

   /* Skip verify of register_convertible, invalid_p == 0 */
   /* Skip verify of register_convert_to_virtual, invalid_p == 0 */
   /* Skip verify of register_convert_to_raw, invalid_p == 0 */

If someone was silly enough to add code that blindly called them then:

   if (gdbarch->register_convert_to_virtual == 0)
     internal_error (__FILE__, __LINE__,
                     "gdbarch: gdbarch_register_convert_to_virtual 
invalid");

would kick in.

	Andrew