various updates to build against xorg-server 21.1.3.

- avoid a const issue with an expanded __UNCONST().
- cope with renamed member names
- deal with "xf86RamDac.h" going away (now use "xf86Cursor.h")

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.

initial import of xf86-video-s3-0.7.0

apply const

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.

merge xf86-video-s3 0.6.5, xf86-video-s3virge 1.10.6, xf86-video-savage 2.3.6,
xf86-video-siliconmotion 1.7.7, xf86-video-sis 0.10.7.

initial import of xf86-video-s3-0.6.5

Add headers for missing prototypes and missing prototypes

Support GENDAC/SDAC for prep.

initial import of xf86-video-s3-0.6.3

merge xf86-video-s3-0.6.2

initial import of xf86-video-s3-0.6.2

Do better error checking around libpciaccess, like the intel driver does.
This makes the driver working again after the last Xorg update.

Although this doesn't really fix the real issue, but makes the driver more
robust, thus it reports the error in the logfile instead of dumping core.

This should go to upstream.

Undo last change, version should be set from makefile.

Fill in version number

Remove .gitignore/.cvsignore files.

Merge new version.

Import xf86-video-s3-0.6.1 from X.org

initial import of xf86-video-s3-0.5.0