CONFIG_PPC_E500MC is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
e500mc Support
configname: CONFIG_PPC_E500MC
Linux Kernel Configuration
└─>Processor support
└─>e500mc Support
In linux kernel since version 2.6.27 (release Date: 2008-10-09)
This must be enabled for running on e500mc (and derivatives
such as e5500/e6500), and must be disabled for running on
e500v1 or e500v2.
such as e5500/e6500), and must be disabled for running on
e500v1 or e500v2.