CONFIG_SGI_IP27 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

Support for SGI IP27 (Origin200/2000)

modulename: ops-bridge.ko

and/or

pci-ip27.ko

configname: CONFIG_SGI_IP27

System type
└─>Support for SGI IP27 (Origin200/2000)
In linux kernel since version 2.6.12  
This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
workstations. To compile a Linux kernel that runs on these, say Y
here.

source code:
arch/mips/pci/pci-ip27.c

is selected by
CONFIG_SGI_IOC3_ETH