CONFIG_PQ2ADS is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc

CONFIG_PQ2ADS (not configurable)

modulename: pq2ads.ko

configname: CONFIG_PQ2ADS

Linux/PowerPC Kernel Configuration
└─>Platform options
└─>PQ2ADS
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
source code:
arch/ppc/platforms/pq2ads.c
depends
CONFIG_ADS8272

is depended by
CONFIG_MPC8272_ADS