CONFIG_MODULE_M28 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_MODULE_M28 (not configurable)

configname: CONFIG_MODULE_M28

Linux Kernel Configuration
└─>MODULE_M28
In linux kernel since version 3.3 (release Date: 2012-03-18)  

depends
CONFIG_ARCH_MXS

is depended by
CONFIG_MACH_M28EVK