CONFIG_DEBUG_RK29_UART1 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

RK29 UART1

configname: CONFIG_DEBUG_RK29_UART1

Low-level debug console UART
└─>RK29 UART1
In linux kernel since version 3.11 (release Date: 2013-09-02)  
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depends
 or CONFIG_ARCH_ROCKCHIP
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