This patch adds the stm32f2xx USART controller
(UART also uses the same controller).
Signed-off-by: NAlistair Francis <alistair@alistair23.me>
Reviewed-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 762c6c0d2a41d574932bc4445ec9bfffe6da8798.1424175342.git.alistair@alistair23.me
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>