CONFIG_DDB5074 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

Support for NEC DDB Vrc-5074 (EXPERIMENTAL)

modulename: fixup-ddb5074.ko

configname: CONFIG_DDB5074

Linux/MIPS Kernel Configuration
└─>Machine selection
└─>Support for NEC DDB Vrc-5074 (EXPERIMENTAL)
In linux kernel since version 2.6.12  
This enables support for the VR5000-based NEC DDB Vrc-5074
evaluation board.

source code:
arch/mips/pci/

depends
CONFIG_EXPERIMENTAL