CONFIG_MACH_VR41XX is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

NEC VR4100 series based machines

configname: CONFIG_MACH_VR41XX

System type
└─>NEC VR4100 series based machines
In linux kernel since version 2.6.12  

is selected by
CONFIG_PCI_VR41XX