drm/msm: add missing of_node_put after calling of_parse_phandle

of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
[rebased on top of Archit's DT rework, so looses one hunk]
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/msm_drv.c

@@ -294,6 +294,7 @@ static int msm_init_vram(struct drm_device *dev)
 	if (node) {
 		struct resource r;
 		ret = of_address_to_resource(node, 0, &r);
+		of_node_put(node);
 		if (ret)
 			return ret;
 		size = r.end - r.start;