drm/dp_mst: Remove huge conditional in drm_dp_mst_handle_up_req()

Which reduces indentation and makes this function more legible.

Cc: Juston Li <juston.li@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Harry Wentland <hwentlan@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190903204645.25487-11-lyude@redhat.com

drivers/gpu/drm/drm_dp_mst_topology.c

@@ -3271,7 +3271,9 @@ static int drm_dp_mst_handle_down_rep(struct drm_dp_mst_topology_mgr *mgr)
 
 static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
 {
-	int ret = 0;
+	struct drm_dp_sideband_msg_req_body msg;
+	struct drm_dp_mst_branch *mstb = NULL;
+	bool seqno;
 
 	if (!drm_dp_get_one_sb_msg(mgr, true)) {
 		memset(&mgr->up_req_recv, 0,
@@ -3279,10 +3281,8 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
 		return 0;
 	}
 
-	if (mgr->up_req_recv.have_eomt) {
-		struct drm_dp_sideband_msg_req_body msg;
-		struct drm_dp_mst_branch *mstb = NULL;
-		bool seqno;
+	if (!mgr->up_req_recv.have_eomt)
+		return 0;
 
 	if (!mgr->up_req_recv.initial_hdr.broadcast) {
 		mstb = drm_dp_get_mst_branch_device(mgr,
@@ -3333,8 +3333,8 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
 		drm_dp_mst_topology_put_mstb(mstb);
 
 	memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
-	}
-	return ret;
+
+	return 0;
 }
 
 /**