x86: baytrail: Add option to disable the internal UART to setup_early_uart()
This patch adds a parameter to the function setup_early_uart() to either enable or disable the internal BayTrail legacy UART. Since the name setup_early_uart() does not match its functionality any more, lets rename it to setup_internal_uart() as well in this patch. Signed-off-by: NStefan Roese <sr@denx.de> Reviewed-by: NBin Meng <bmeng.cn@gmail.com> Reviewed-by: NSimon Glass <sjg@chromium.org>
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