TPM HW Random Number Generator support

configname: CONFIG_HW_RANDOM_TPM

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>TPM Hardware Support
└─>Hardware Random Number Generator Core support
└─>Hardware Random Number Generator Core support
└─>TPM HW Random Number Generator support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This setting exposes the TPM's Random Number Generator as a hwrng
device. This allows the kernel to collect randomness from the TPM at
boot, and provides the TPM randomines in /dev/hwrng.

If unsure, say Y.