* CONFIG_SYS_NS16550 - Include the NS16550 driver
* CONFIG_SYS_NS16550_SERIAL - Include the serial (wrapper) driver
* CONFIG_SYS_NS16550_CLK - Frequency of reference clock
* CONFIG_SYS_NS16550 - Include the NS16550 driver
* CONFIG_SYS_NS16550_SERIAL - Include the serial (wrapper) driver
* CONFIG_SYS_NS16550_CLK - Frequency of reference clock