updates for xf86-video-amdgpu 23.0.

sync with generated config.h

turns on HAVE_FBGLYPHS and HAVE_GBM_BO_USE_LINEAR.

update for new amdgpu.

merge xf86-video-ati 19.1.0, xf86-video-amdgpu 19.1.0,
xf86-video-geode 2.11.20, and xf86-video-s3 0.7.0.

update for xf86-video-amdgpu 19.0.1.

merge xf86-video-amdgpu 19.0.0.

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

update for 18.1.0.

merge xf86-video-amdgpu 18.0.0.

update for amdgpu 1.3.0

merge xf86-video-amdgpu-1.3.0, xf86-video-ati-7.9.0,
xf86-video-nouveau-1.0.15, and xf86-video-openchrome-0.6.0.

update for 1.2.0

add a config.h for amdgpu driver