Driver specific omap mailbox cleanup. Mostly to remove

broken legacy code for omap1 and move things towards
device tree.

These patches were posted a while back, but I did not
realize I was supposed to merge the driver related
parts too. So apologies for a late pull request on
these changes.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=ZyPG
-----END PGP SIGNATURE-----