thermal: tsens: Add MTC and sysfs support for sensors

Multi-Zone Temperature Control (MTC) provides an interface to
clients to enable or disable thresholds for supported zone of sensors
and to get log of recent commands. Create sysfs nodes to access
MTC tsens.

Change-Id: I87186159ba46572944397b0b35391f7fd33b4f8b
Signed-off-by: Ashok Jammigumpula <jashok@codeaurora.org>