[rfa] FRV input files

[Andrew Cagney]

[and so did doug]
 > 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.

Andrew