Flash and recovery instructions: Use the factory installed u-boot boot
loader. It is available on UART2 (115200,8,n,1). Then get the
sysupgrade image from a tftp server.
Signed-off-by: Tobias Welz <tw@wiznet.eu>
[whitespace and device name in makefile fixes] Signed-off-by: Petr Štetiar <ynezz@true.cz>