CONFIG_M527x is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

CONFIG_M527x (not configurable)

modulename: m527x.ko

configname: CONFIG_M527x

Linux Kernel Configuration
└─>M527x
In linux kernel since version 2.6.12  
source code:
arch/m68k/platform/coldfire/
depends
CONFIG_COLDFIRE

is selected by
CONFIG_FEC

is depended by
CONFIG_M5271
CONFIG_M5275