CONFIG_DEBUG_IMX7D_UART is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
i.MX7D Debug UART
configname: CONFIG_DEBUG_IMX7D_UART
Kernel low-level debugging port
└─>i.MX7D Debug UART
In linux kernel since version 4.1 (release Date: 2015-06-21)
Say Y here if you want kernel low-level debugging support
on i.MX7D.
on i.MX7D.