Rather than leave DGA languishing in extmod, move it to be a built-in
extension. As it's quite specific to the Xorg DDX, just move it
sideways to the rest of the DGA code in hw/xfree86/common, and
initialise it from xf86ExtensionInit, rather than miinitext.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Acked-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
7a5880bc3b