CONFIG_MVME5100 is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Motorola/Emerson MVME5100

modulename: mvme5100.ko

configname: CONFIG_MVME5100

Linux Kernel Configuration
└─>Motorola/Emerson MVME5100
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option enables support for the Motorola (now Emerson) MVME5100
board.

source code: