console: add dmabuf modifier field.

dmabufs can have a format modifier (DRM_FORMAT_MOD_*) which is used for
tiled layouts for example.  Add a field to QemuDmaBuf so we can carry
around that information.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190529072144.26737-2-kraxel@redhat.com

include/ui/console.h

@@ -175,6 +175,7 @@ typedef struct QemuDmaBuf {
     uint32_t  height;
     uint32_t  stride;
     uint32_t  fourcc;
+    uint64_t  modifier;
     uint32_t  texture;
     bool      y0_top;
 } QemuDmaBuf;