boards/opencm904: set UART_STDIO_BAUDRATE to 921600

boards/opencm904/include/board.h

@@ -66,6 +66,15 @@ extern "C" {
  */
 #define UART_STDIO_DEV      UART_DEV(0)
 
+/**
+ * @brief Override with ROBOTIS Bluetooth antenna baudrate for STDIO
+ * @{
+ */
+#ifndef UART_STDIO_BAUDRATE
+#define UART_STDIO_BAUDRATE (921600UL)
+#endif
+/** @} */
+
 /**
  * @brief   Initialize board specific hardware, including clock, LEDs and std-IO
  */