CONFIG_M5249 is not available for the selected architecture x86.
Result is shown for architecture m68knommu

MCF5249

modulename: timers.ko

configname: CONFIG_M5249

CPU
└─>MCF5249
In linux kernel since version 2.6.12 )
Motorola ColdFire 5249 processor support.
source code:
arch/m68knommu/platform/coldfire/
is selected by
CONFIG_COLDFIRE