drm/msm: dsi host: add missing of_node_put()

Decrement device node refcount if of_get_child_by_name is successfully
called.
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/dsi/dsi_host.c

@@ -1605,9 +1605,13 @@ int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer)
 			node = of_get_child_by_name(msm_host->pdev->dev.of_node,
 							"panel");
 			if (node) {
-				if (!of_drm_find_panel(node))
+				if (!of_drm_find_panel(node)) {
+					of_node_put(node);
 					return -EPROBE_DEFER;
 				}
+
+				of_node_put(node);
+			}
 		}
 	}