Add a compatible string for the UART inside the Nuvoton WPCM450 SoC. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Link: https://lore.kernel.org/r/20210320181610.680870-5-j.neuschaefer@gmx.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>