CONFIG_DEBUG_OMAP7XXUART1 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_DEBUG_OMAP7XXUART1.
Result is shown for kernelversion 6.9.5

Kernel low-level debugging via OMAP730 UART1


Kernel low-level debugging port
└─>Kernel low-level debugging via OMAP730 UART1
In linux kernel since version 4 (release Date: 2015-04-12)  
Say Y here if you want kernel low-level debugging support
on OMAP730 based platforms on the UART1.