Regcache changes broke MIPS

[Andrew Cagney]

> Grumph.
> 
> Because GDB isn't 100% multi-arch, it ends up having to use target macros from within _initialize_*().  Otherwize non- multi-arch code won't start up right.  When multi-arch is enabled, a dummy multi-arch vector is used.
> 
> Anyway, I think there is something even more messed up here.  First, I'm not sure why that function was called from within an _initialize*() function.  Secondly, the logic just looks backwards.
> 
> I'll do some pokeing.


Hmm, doctor the patient is worse than we thought (and how ironic, this 
one is my target).

Briefly, the MIPS still defines certain methods (REGISTER_RAW_SIZE() at 
least) as macro's mapped onto functions instead of true multi-arch 
methods.  That is why they are being called when they shouldn't.

I came up with a patch that fixed just REGISTER_RAW_SIZE() but that 
didn't fix it - suspect I need to find more.

enjoy?
Andrew