default or selected kernelversion does not have config value CONFIG_GPIO_ZX.
Result is shown for kernelversion 6.7-rc3

ZTE ZX GPIO support

modulename: gpio-zx.ko

configname: CONFIG_GPIO_ZX

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>ZTE ZX GPIO support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Say yes here to support the GPIO device on ZTE ZX SoCs.

source code:

depends
CONFIG_GPIOLIB
CONFIG_HAS_IOMEM
CONFIG_ARCH_ZX or CONFIG_COMPILE_TEST