CONFIG_BVME6000 is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

BVME4000 and BVME6000 support

configname: CONFIG_BVME6000

Linux/68k Kernel Configuration
└─>Platform dependent setup
└─>BVME4000 and BVME6000 support
In linux kernel since version 2.6.12  
Say Y to include support for VME boards from BVM Ltd. This will
build a kernel which can run on BVME4000 and BVME6000 boards. If
you select this option you will have to select the appropriate
drivers for SCSI, Ethernet and serial ports later on.