Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Remove duplicate SRCS include block. Spotted by jmallett.

Add the macio attachment for wi(4). Partially obtained from NetBSD.

Reviewed by: adrian
Obtained from: NetBSD (partially)

Fix 'make depend'.

Remove opt_wi.h from module and fix typo in pccarddevs.

Let modules use the kernel's opt_*.h files if built along with
the kernel by wrapping all targets for fake opt_*.h files in
.if defined(KERNBUILDDIR). Thus, such fake files won't be
created at all if modules are built with the kernel.

Some modules undergo cleanup like removing unused or unneeded
options or .h files, without which they wouldn't build this way
or the other.

Reviewed by: ru
Tested by: no binary changes in modules built alone
Tested on: i386 sparc64 amd64

Move to generating pccarddevs.h on the fly, both for the kernel and
the modules.

Also generate usbdevs.h automatically now, but a non-kernel file is
stopping that at the moment.

remove wi-specific host ap code; the wi driver now depends on the
wlan module for 802.11 core support

We now have opt_wi.h, so go ahead and add it. Default it to 1.

-DWI_HOSTAP no longer needed

First cut at breaking out the bus attachment from the bus independent
part of the driver. Also, move the softc and some other stuff to
if_wivar.h from if_wireg.h to make future merging activities easier.

Clean up the bogus pci.h file we create.

wi driver now includes pci.h, so we need to generate it to generate it.

Forgot to add pci_if.h to SRCS

Pointed out by: phk

Argh! add card_if.h to the generated list. This fixes kernel builds for
those who haven't added 'NO_MODULES=off' to /etc/make.conf.

Note new location of wi driver source code.

Use a consistent style and one much closer to the rest of /usr/src

Use .include <bsd.kmod.mk> to get to ../../*/conf/kmod.mk instead of
encoding the relative path.

Pull in sys/conf/kmod.mk, rather than /usr/share/mk/bsd.kmod.mk.
This means that the kernel can be totally self contained now and is not
dependent on the last buildworld to update /usr/share/mk. This might
also make it easier to build 5.x kernels on 4.0 boxes etc, assuming
gensetdefs and config(8) are updated.

Add ${DEBUG_FLAGS} to CFLAGS in bsd.kmod.mk, not in scattered module
makefiles. Bad examples in fxp/Makefile keep getting copied to new
makefiles.

Removed special rules for building and cleaning device interface files
and empty options files. The rules are now generated automatically in
bsd.kmod.mk. Cleaned up related things ($S and ${CLEANFILES}).

Update the WaveLAN/IEEE driver:

- Convert to new bus attachment scheme. Thanks to Blaz Zupan for doing
the initial work here. One thing I changed was to have the attach
and detach routines work like the PCI drivers, which means that in
theory you should be able to load and unload the driver like the PCI
NIC drivers, however the pccard support for this hasn't settled down
yet so it doesn't quite work. Once the pccard work is done, I'll have
to revisit this.

- Add device wi0 to PCCARD. If we're lucky, people should be able to
install via their WaveLAN cards now.

- Add support for signal strength caching. The wicontrol utility has
also been updated to allow zeroing and displaying the signal strength
cache.

- Add a /sys/modules/wi directory and fix a Makefile to builf if_wi.ko.
Currently this module is only built for the i386 platform, though once
the pccard stuff is done it should be able to work on the alpha too.
(Theoretically you should be able to plug one of the WaveLAN/IEEE ISA
cards into an alpha with an ISA slot, but we'll see how that turns out.

- Update LINT to use only device wi0. There is no true ISA version of
the WaveLAN/IEEE so we'll never use an ISA attachment.

- Update files.i386 so that if_wi is dependent on card.