default or selected kernelversion does not have config value CONFIG_DRM_PSB_MFLD.
Result is shown for kernelversion 6.2.5

Intel Medfield support (Experimental)

configname: CONFIG_DRM_PSB_MFLD

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Intel Medfield support (Experimental)
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say yes to include support for Intel Medfield platforms with MIPI
interfaces.