supporting hw break/watch for embedded ppc

[John S. Yates, Jr.]

I have an mpc855 remote stub that implements Z0/z0.
This worked entirely as expected.  Auto-detection
used to attempt Z0, discover it was unsupported,
and refrained from ever trying it again.  Naively I
assumed that the remaining Zt variants would behave
similarly.  This is not the case.

So where do I go to enable ppc hw breaks/watches?

/john