CONFIG_P5020_DS is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Freescale P5020 DS

modulename: p5020_ds.ko

configname: CONFIG_P5020_DS

Linux Kernel Configuration
└─>Freescale Book-E Machine Type
└─>Freescale P5020 DS
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
This option enables support for the P5020 DS board

source code: