CONFIG_M5275EVB is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

Freescale (Motorola) M5275EVB board support

configname: CONFIG_M5275EVB

Linux Kernel Configuration
└─>Freescale (Motorola) M5275EVB board support
In linux kernel since version 2.6.12  
Support for the Freescale (Motorola) M5275EVB board.

depends
CONFIG_M5275