CONFIG_PCI_TX4927 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_PCI_TX4927 (not configurable)

modulename: ops-tx4927.ko

configname: CONFIG_PCI_TX4927

Linux Kernel Configuration
└─>PCI_TX4927
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
source code:
arch/mips/pci/ops-tx4927.c