CONFIG_SOC_ZX296702 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_SOC_ZX296702.
Result is shown for kernelversion 6.9.9

CONFIG_SOC_ZX296702 (not configurable)

modulename: zx296702.ko

and/or

clk-zx296702.ko

configname: CONFIG_SOC_ZX296702

Linux Kernel Configuration
└─>ZTE ZX family
└─>SOC_ZX296702
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Support for ZTE ZX296702 SoC which is a dual core CortexA9MP

source code:
/arch/arm/mach-zx/

depends
CONFIG_ARCH_ZX