drm/nouveau: remove left-over !DRIVER_MODESET paths

It's far preferable to have the driver do nothing at all for "nomodeset".

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 4274281..bcf7ed3 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -277,8 +277,7 @@
 
 	nouveau_ttm_global_release(dev_priv);
 
-	if (drm_core_has_AGP(dev) && dev->agp &&
-	    drm_core_check_feature(dev, DRIVER_MODESET)) {
+	if (drm_core_has_AGP(dev) && dev->agp) {
 		struct drm_agp_mem *entry, *tempe;
 
 		/* Remove AGP resources, but leave dev->agp