CONFIG_ALPHA_DP264 is not available for thedefaultarchitecture x86.
Result is shown for architecture alpha

DP264

modulename: sys_dp264.ko

configname: CONFIG_ALPHA_DP264

Alpha system type
└─>DP264
In linux kernel since version 2.6.12  
Various 21264 systems with the tsunami core logic chipset.
API Networks: 264DP, UP2000(+), CS20;
Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.

source code: