[rfa] `struct _bfd' -> `struct bfd'

[Andrew Cagney]

> Andrew Cagney writes:
>  > PS, Perhaps they should (mostly) go in src/cpu/<cpu>/frv.*?
> 
> Or (for completeness' sake), src/cpu/cgen/*.
> 
> Or ...
> GCC didn't use to have config/<cpu> subdirs.
> They were added when config got too big.
> I think it would be reasonable to just use src/cpu/frv.*
> (and ditto for the other .cpu/.opc files)
> until the directory became populated enough that which form
> the next step took became more clear.

True.   That may be sooner than you think.  For MIPS, there is the 
potential for: mips.igen, tx.igen, vr.igen, mdmx.igen, m16.igen, 
sb1.igen, ....

Andrew