CONFIG_METAG_USER_TCM is not available for thedefaultarchitecture x86.
Result is shown for architecture metag

Meta on-chip memory support for userland

modulename: tcm.ko

configname: CONFIG_METAG_USER_TCM

Linux Kernel Configuration
└─>SoC configuration
└─>Meta on-chip memory support for userland
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Allow the on-chip memories of Meta SoCs to be used by user
applications.

source code: