CONFIG_SGI_HAS_WD93 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_SGI_HAS_WD93 (not configurable)

configname: CONFIG_SGI_HAS_WD93

Linux Kernel Configuration
└─>SGI_HAS_WD93
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
is depended by
CONFIG_SGI_IP28