drm/nv50/disp: call into core for dac load detection

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/nva3.c b/drivers/gpu/drm/nouveau/core/engine/disp/nva3.c
index 7aee31f..398bb87 100644
--- a/drivers/gpu/drm/nouveau/core/engine/disp/nva3.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/nva3.c
@@ -83,6 +83,7 @@
 	priv->dac.nr = 3;
 	priv->sor.nr = 4;
 	priv->dac.power = nv50_dac_power;
+	priv->dac.sense = nv50_dac_sense;
 	priv->sor.power = nv50_sor_power;
 
 	INIT_LIST_HEAD(&priv->base.vblank.list);