Tiled upload of images after software fallback.
Tiled upload of images after software fallback.

Instead of uploading the full software image in one go, upload it in
512x512 tiles to avoid having to find huge huge blocks of memory and
potentially running out.

dezelin/xf86-video-qxl,fgouget/xf86-video-qxl,fgouget/xf86-video-qxl,facboy/xserver-xorg-video-qxl,dezelin/xf86-video-qxl,sombrafam/virtioqxl-xf86-video-qxl,facboy/xserver-xorg-video-qxl,facboy/xserver-xorg-video-qxl,fgouget/xf86-video-qxl,fgouget/xf86-video-qxl,sombrafam/virtioqxl-xf86-video-qxl,dezelin/xf86-video-qxl,sombrafam/virtioqxl-xf86-video-qxl,facboy/xserver-xorg-video-qxl