serial: Set baudrate on boot

Currently, the baud rate is never set on boot. This works ok when a previous
bootloader has configured the baudrate properly, or when the baudrate is set to
a reasonable default in the serial driver's probe(). However, when this is not
the case, we could be using a different baud rate than what was configured.

Signed-off-by: Sean Anderson <seanga2@gmail.com>

drivers/serial/serial-uclass.c

@@ -162,6 +162,7 @@ int serial_init(void)
 #if CONFIG_IS_ENABLED(SERIAL_PRESENT)
 	serial_find_console_or_panic();
 	gd->flags |= GD_FLG_SERIAL_READY;
+	serial_setbrg();
 #endif
 
 	return 0;