fix various errors and warnings with xorg-server 1.20:

- no Error() in scope
- more wakeup/blockhandler ABI changes
- more notify fd API changes
- more xf86CursorResetCursor changes
- lots of char* -> const char*
- fix ati kms config.h now HAVE_XF86_CURSOR_RESET_CURSOR is available
- another xf86GetOS() is removed fix
- OsBlockSIGIO() etc, -> old, but still around API until properly converted
- don't free const char * data owned by some other system

mostly fix amd64 xorg-server 1.20 builds:

- avoid bswap_16 etc defines for now. ends up with code-in-decl
- more ABI_VERSION 23 fixes (BlockHandler/WakeHandler) including re-fix
from previous
- more Notify API
- more shadowUpdatePackedWeak() removal
- remove fd_set handling from intel driver (part of ABI_VERSION 23)
- cope better with PixMap/Drawable separation in new server
- remove support for maxHValue and maxVValue (XXX?)
- hide drmmode_udev_notify() when not building udev
- comment out nouveau 'wfb' support, xorg-server 1.20 only supplies
either 'wfb' or 'fb' interface, not both, and we choose 'fb'
- define 'pointer' in nv_proto.h rather than relying upon Xdefs.h
- normalise the value of _XTYPEDEF_POINTER
- EGL is broken (missing) in xsrc currently

mibstore.h and its miInitializeBackingStore() have been otherwise empty
since at least xorg-server 1.10. remove all reference to them as the
header is gone in xorg-server 1.18.

initial import of xf86-video-ati-6.14.6.

NetBSD note: The libdrm requirement seems to be KMS related which we do
not have.

* 6.15.6
This version requires the latest libdrm 2.4.36 release, and fixes a few
other bugs seen since 6.14.5.
* 6.14.5
- add solid picture accel
- tiling fixes
- new pci ids
- 6xx-9xx Xv improvements
- support for upcoming xserver API changes
- bug fixes

initial import of xf86-video-ati-6.14.4

initial import of xf86-video-ati-6.14.2. important changes include:
many evergreen/cayman/fusion features and fixes
R520 feature updates
UMS r6xx/r7xx bug fix (from yours truly)
clang derived fixes
fixes for xorg-server 1.10 (not relevant for us yet)
EXA fixes
adds support for these chipsets:
BARTS - Radeon HD 6850/6870
TURKS - Radeon HD 6570/6670
CAICOS - Radeon HD 6450
CAYMAN - Radeon HD 6950/6970/6990
and several more PCI-IDs for older chipsets

initial import of xf86-video-ati-6.14.1. changes include:

- several Xv fixes
- lots of kms/other stuff we can't use yet
- fixes for some crashes

- various fixes for Xvideo
- significantly superior evergreen support:
- Xv, EXA, DRI2/KMS, UMS VT switching
- various other UMS fixes
- a few random bug fixes for older chipsets
- add support for ontario (AMD Fusion), including;
- Xv, EXA, UMS
- DVI vs. HDMI fixes
- various DRI2/KMS fixes
- add support for "NI" family cards, which *require* KMS. foo..
- many other random bug fixes

initial import of xf86-video-ati-6.13.2

initial import of xf86-video-ati-6.13.1

initial import of xf86-video-ati-6.13.0