CONFIG_MIPS_TX3927 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_MIPS_TX3927 (not configurable)

modulename: ops-tx3927.ko

and/or

ops-jmr3927.ko

configname: CONFIG_MIPS_TX3927

Linux/MIPS Kernel Configuration
└─>Machine selection
└─>MIPS_TX3927
In linux kernel since version 2.6.12  
source code:
arch/mips/pci/


is depended by
CONFIG_TOSHIBA_JMR3927