The environment variable RSMI_MUTEX_THREAD_ONLY=1 to enable thread only mutex.
The RSMI_INIT_FLAG_THRAD_ONLY_MUTEX can also be pass to rsmi_init()
to enable thread only mutex.
Change-Id: I2d9844039b774e386f03bb9bb130d8c342504ea6
[ROCm/rocm_smi_lib commit: 6ff95e55da]