This set of 12 patches pulls all of the existing compat
handling for WEXT ioctls out of fs/compat_ioctl.c and
allows implementations down in the driver layers to
handle compat issues properly when necessary.

In particular it fixes the bug where iw_point objects
were not being size translated properly in scan
streams and similar.

Currently I've only made sure this compiles properly.
I'm half-way done with a dummy wireless driver that
can be used purely to validate WEXT ioctl handling
correctness in the core wireless layers.