Dropping sun4v as a platform

[Garrett Wollman]

In article <mit.lcs.mail.freebsd-arch/BANLkTi=_GQKh1cSedgfN+mfQfGMj3LtTSQ at mail.gmail.com> you write:
>I volunteered to remove it from the tree some time back knowing that I
>wouldn't have the time to work on it and that no one else had the
>inclination to pick it up. Keep in mind that removing it doesn't bar
>someone from bringing back support at some time in the future, it just
>removes the misconception that it is in some way supported.

On the other hand, it's a sufficiently weird platform in various ways
that having FreeBSD at least be compile-tested on it from time to time
is not a bad thing.  Newer manycore architectures are likely to be
more similar to sun4v on many ways than they are to amd64.  On the
gripping hand, if there are not enough interested people to maintain
the platform, then there probably won't be enough interested people to
fix the compile when it breaks, either.

-GAWollman