CONFIG_DEBUG_ZOOM_UART is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Kernel low-level debugging messages via Zoom2/3 UART

configname: CONFIG_DEBUG_ZOOM_UART

Kernel low-level debugging port
└─>Kernel low-level debugging messages via Zoom2/3 UART
In linux kernel since version 3.1 (release Date: 2011-10-24)