MR cleanups

Christoph Hellwig
2015-12-18T13:54:56Z

Hi Doug,

this series (on top of your k.o/for-4.5 branch) has various MR-related
cleanups: starting to document the device capabilities, removing lots
of dead MR/MW code and removing a useless field in struct ib_mr. This
should be fairly uncontroversial I hope, so I'd like to get it in before
the real MR changes.