thermal: tsens: Add MTC history support

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

Change-Id: Iea5321534f6b718b79d855be54df072f8a627db1
Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org>