drm/nouveau: Don't pick an interlaced mode as the panel native mode.

Rescaling interlaced modes isn't going to work correctly, and even if
it did, come on, interlaced flat panels? are you pulling my leg?

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 5070428..7f749d2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -506,7 +506,8 @@
 	int high_w = 0, high_h = 0, high_v = 0;
 
 	list_for_each_entry(mode, &nv_connector->base.probed_modes, head) {
-		if (helper->mode_valid(connector, mode) != MODE_OK)
+		if (helper->mode_valid(connector, mode) != MODE_OK ||
+		    (mode->flags & DRM_MODE_FLAG_INTERLACE))
 			continue;
 
 		/* Use preferred mode if there is one.. */