default or selected kernelversion does not have config value CONFIG_AR600x_DEBUG_UART_TX_PIN.
Result is shown for kernelversion 6.2.5
GPIO
configname: CONFIG_AR600x_DEBUG_UART_TX_PIN
Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>GPIO
In linux kernel since version 2.6.37 (release Date: 2011-01-04)
WLAN GPIO to be used for Debug UART (Tx)