Although RISC-V 64-bit doesn't have official golang support there are
forks that now exist with at least some support and work is ongoing in
the upstream tree. In order to be able to use the goarch class add
support for RISC-V.
For more details see here:
https://github.com/golang/go/issues/27532
Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
