[PATCH] drm/dp_mst: Fix drm_dp_mst_topology.c selftest compilation warning

[Tang Bin]

The struct drm_dp_desc contains struct drm_dp_dpcd_ident, and the struct
drm_dp_dpcd_ident contains the array, so zero-initialization requires a 
more couple of braces. In the ARM compiler environment, the compile 
warning pointing it out:
    drivers/gpu/drm/drm_dp_mst_topology.c: In function 'drm_dp_mst_dsc_aux_for_port':
    drivers/gpu/drm/drm_dp_mst_topology.c:5494:9: warning: missing braces around initializer [-Wmissing-braces]
      struct drm_dp_desc desc = { 0 };

Signed-off-by: Tang Bin <tangbin@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Shengju Zhang <zhangshengju@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 70c4b7a..4d8d1fd 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -5494,7 +5494,7 @@ struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port)
 {
 	struct drm_dp_mst_port *immediate_upstream_port;
 	struct drm_dp_mst_port *fec_port;
-	struct drm_dp_desc desc = { 0 };
+	struct drm_dp_desc desc = { { { 0 } } };
 	u8 endpoint_fec;
 	u8 endpoint_dsc;
 
-- 
2.7.4