MPIC cleanup series

[Benjamin Herrenschmidt]

Hi Kyle !

I can't reply to the patches themselves easily unfortunately as I
accidentally deleted them from my mailer :-)

Overall I really look your series. It doesn't quite apply cleanly
anymore so I'll as you for a new shoot after you address the comments
below, at which point, if you're fast enough, I'll stick it in -next :-)

Just a couple of comments on some of the patches:

 - 5/10: search for open-pic device-tree node if NULL

The idea is fine, however most callers ignore the device-type and only
compare on compatible, while you replace that with a match entry that
seems to require matching on both. This is likely to break stuff. The
"type" part of te march entry should be NULL I believe.

 - 9/10: cache the node

of_node_get() is your friend. 

 - 10/10: Makes me a bit nervous. It 'looks' right but I wouldn't bet on
Apple device-trees being sane vs. chaining. I would like a test that
doesn't do the cascade if the mpic is a primary to at least limit the
risk of messup.

Cheers,
Ben.