default or selected kernelversion does not have config value CONFIG_SCx200_I2C_SCL.
Result is shown for kernelversion 6.5.1

GPIO pin used for SCL

configname: CONFIG_SCx200_I2C_SCL

Linux Kernel Configuration
└─>Device Drivers
└─>I2C support
└─>I2C Hardware Bus support
└─>GPIO pin used for SCL
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Enter the GPIO pin number used for the SCL signal. This value can
also be specified with a module parameter.