CONFIG_SGI_HAS_HAL2 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_SGI_HAS_HAL2 (not configurable)

configname: CONFIG_SGI_HAS_HAL2

Linux/MIPS Kernel Configuration
└─>SGI_HAS_HAL2
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
is depended by
CONFIG_SGI_IP28