CONFIG_M5441x is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

MCF5441x

modulename: m5441x.ko

configname: CONFIG_M5441x

Linux Kernel Configuration
└─>MCF5441x
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Freescale Coldfire 54410/54415/54416/54417/54418 processor support.

source code: