CONFIG_PCI_QSPAN is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

QSpan PCI

configname: CONFIG_PCI_QSPAN

Linux Kernel Configuration
└─>Bus options
└─>QSpan PCI
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
Say Y here if you have a system based on a Motorola 8xx-series
embedded processor with a QSPAN PCI interface, otherwise say N.