drm/nv50/disp: fix evo for create/init + destroy/fini split

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

drivers/gpu/drm/nouveau/nv50_display.h

@@ -79,6 +79,8 @@ int  nv50_display_flip_next(struct drm_crtc *, struct drm_framebuffer *,
 			    struct nouveau_channel *chan);
 void nv50_display_flip_stop(struct drm_crtc *);
 
+int  nv50_evo_create(struct drm_device *dev);
+void nv50_evo_destroy(struct drm_device *dev);
 int  nv50_evo_init(struct drm_device *dev);
 void nv50_evo_fini(struct drm_device *dev);
 void nv50_evo_dmaobj_init(struct nouveau_gpuobj *, u32 memtype, u64 base,