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

CONFIG_HW_HAS_EISA (not configurable)

configname: CONFIG_HW_HAS_EISA

Linux Kernel Configuration
└─>Bus options (PCI, PCMCIA, EISA, ISA, TC)
└─>HW_HAS_EISA
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
is selected by
CONFIG_EISA