CONFIG_ARM64_SW_TTBR0_PAN is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

Emulate Privileged Access Never using TTBR0_EL1 switching

configname: CONFIG_ARM64_SW_TTBR0_PAN

Linux Kernel Configuration
└─>Kernel Features
└─>Emulate Privileged Access Never using TTBR0_EL1 switching
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Enabling this option prevents the kernel from accessing
user-space memory directly by pointing TTBR0_EL1 to a reserved
zeroed area and reserved ASID. The user access routines
restore the valid TTBR0_EL1 temporarily.