rockchip: video: vop: Fix format of fbbase in debug string

The debug string printing the device name, framebuffer address and of node
is using %lu as format for the framebuffer address, which is not so nice.
Change it to %lx.
Signed-off-by: NArnaud Patard <arnaud.patard@rtp-net.org>
Tested-by: NPeter Robinson <pbrobinson@gmail.com>

drivers/video/rockchip/rk_vop.c

@@ -240,7 +240,7 @@ static int rk_display_init(struct udevice *dev, ulong fbbase, ofnode ep_node)
 	ofnode remote;
 	const char *compat;
 
-	debug("%s(%s, %lu, %s)\n", __func__,
+	debug("%s(%s, 0x%lx, %s)\n", __func__,
 	      dev_read_name(dev), fbbase, ofnode_get_name(ep_node));
 
 	ret = ofnode_read_u32(ep_node, "remote-endpoint", &remote_phandle);