dm: serial: Deal with stdout-path with an alias
Sometimes stdout-path contains a UART alias along with speed, etc. For example: stdout-path = "serial0:115200n8"; Add support for decoding this. Signed-off-by: NSimon Glass <sjg@chromium.org> Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
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