DRI2 is more abstract than the original DRI and isn't tied to OpenGL or any
other rendering system, and as such is being used by more than OpenGL support in
xserver. In particular, the new modesettings driver uses DRI2 to accelerate
drawing, so enable DRI2 by default.
This was spotted because the "nodistro" DISTRO doesn't enable OpenGL, so xserver
failed to build as dri2proto wasn't built.
Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
