CONFIG_CSB726_CSB701 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_CSB726_CSB701.
Result is shown for kernelversion 6.9.9

Enable support for CSB701 baseboard

modulename: csb701.ko

configname: CONFIG_CSB726_CSB701

Linux Kernel Configuration
└─>PXA2xx/PXA3xx-based
└─>Intel PXA2xx/PXA3xx Implementations
└─>Enable support for CSB701 baseboard
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
source code:
arch/arm/mach-pxa/csb701.c