drm/nouveau: support modesetting on GM107

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index 2401159..1eb86da 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -488,6 +488,7 @@
 
 	if (drm->vbios.dcb.entries) {
 		static const u16 oclass[] = {
+			GM107_DISP_CLASS,
 			NVF0_DISP_CLASS,
 			NVE0_DISP_CLASS,
 			NVD0_DISP_CLASS,