CONFIG_S5P_DEV_I2C_HDMIPHY is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_S5P_DEV_I2C_HDMIPHY.
Result is shown for kernelversion 6.5.1

CONFIG_S5P_DEV_I2C_HDMIPHY (not configurable)

configname: CONFIG_S5P_DEV_I2C_HDMIPHY

Linux Kernel Configuration
└─>S5P_DEV_I2C_HDMIPHY
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Compile in platform device definitions for I2C HDMIPHY controller