CONFIG_PPC_EARLY_DEBUG_WSP is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Early debugging via WSP's internal UART

configname: CONFIG_PPC_EARLY_DEBUG_WSP

Early debugging console
└─>Early debugging via WSP's internal UART
In linux kernel since version 3 (release Date: 2011-07-21)  

depends
CONFIG_PPC_WSP