[MIPS] Add saa and saad instructions for octeon

[Richard Sandiford]

Andrew Pinski <andrew.pinski@caviumnetworks.com> writes:
> Hi,
>   This patch adds the saa and saad instructions for Octeon.   They are
> not part of the original Octeon but are part of the Octeon+.  We at
> Cavium don't feel the need to add a new arch for it since this is the
> only difference instruction wise and the original Octeon is no longer
> in production.

I think it's still worth having a separate CPU name for it.

Richard