CONFIG_M5271 is not available for thedefaultarchitecture x86.
Result is shown for architecture m68knommu
MCF5271
configname: CONFIG_M5271
CPU
└─>MCF5271
In linux kernel since version 2.6.14 (release Date: 2005-10-27)
Freescale (Motorola) ColdFire 5270/5271 processor support.