CONFIG_SYS_SUPPORTS_PCI is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

CONFIG_SYS_SUPPORTS_PCI (not configurable)

configname: CONFIG_SYS_SUPPORTS_PCI

Linux Kernel Configuration
└─>SYS_SUPPORTS_PCI
In linux kernel since version 2.6.23 (release Date: 2007-10-09)  
is depended by
CONFIG_SH_CAYMAN