CONFIG_MODULE_TX28 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_MODULE_TX28 (not configurable)

modulename: module-tx28.ko

configname: CONFIG_MODULE_TX28

Linux Kernel Configuration
└─>MODULE_TX28
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
source code: