CONFIG_P1023_RDS is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Freescale P1023 RDS/RDB

modulename: p1023_rds.ko

configname: CONFIG_P1023_RDS

Linux Kernel Configuration
└─>Freescale Book-E Machine Type
└─>Freescale P1023 RDS/RDB
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This option enables support for the P1023 RDS and RDB boards

source code: