On Fri, Feb 05, 2021 at 02:57:25PM +0800, Shengjiu Wang wrote:

This is a dummy cpu dai driver for rpmsg audio use case,
which is mainly used for getting the user's configuration

This is actually doing stuff, it's not a dummy driver.

+static int fsl_rpmsg_remove(struct platform_device *pdev)
+{
+	return 0;
+}

If this isn't needed just remove it.