CONFIG_DEBUG_IMX6Q_UART_PORT is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_DEBUG_IMX6Q_UART_PORT.
Result is shown for kernelversion 5.17.13

i.MX6Q Debug UART Port (1-5)


Linux Kernel Configuration
└─>Kernel hacking
└─>i.MX6Q Debug UART Port (1-5)
In linux kernel since version 3.8 (release Date: 2013-02-18)  
Choose UART port on which kernel low-level debug messages
should be output.