x11-drivers/xf86-video-s3: Update to 0.7.0

Update x11-drivers/xf86-video-s3 to 0.7.0
Remove patches that are incorporated in this release.
Add license information
This version has not been tested with actual hardware.
This is a maintenance release

Changelog:
https://lists.x.org/archives/xorg-announce/2019-July/003015.html

Obtained from: FreeBSD Graphics Team development repo

		https://github.com/FreeBSDDesktop/freebsd-ports/tree/feature/xorglibs