drm/nv50/disp: allocate display from driver core

EVO channels still handled "manually", this won't be ported here, and
will instead be held off until nv50_display/nvd0_display are merged.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nv50_display.h

@@ -44,6 +44,7 @@ struct nv50_display_crtc {
 struct nv50_display {
 	struct nouveau_channel *master;
 
+	struct nouveau_object *core;
 	struct nouveau_gpuobj *ramin;
 	u32 dmao;
 	u32 hash;