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

CONFIG_SHMOBILE_IPMMU_TLB (not configurable)

configname: CONFIG_SHMOBILE_IPMMU_TLB

Linux Kernel Configuration
└─>Device Drivers
└─>IOMMU Hardware Support
└─>SHMOBILE_IPMMU_TLB
In linux kernel since version 3.1 (release Date: 2011-10-24)  

is depended by
CONFIG_SHMOBILE_IOMMU