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

Zoom2/3 UART

configname: CONFIG_DEBUG_ZOOM_UART

Low-level debug console UART
└─>Zoom2/3 UART
In linux kernel since version 3.1 (release Date: 2011-10-24)  

depends
 or CONFIG_ARCH_OMAP2PLUS