msm: lmh_lite: Add debug support in LMH driver

Add support to use the trustzone APIs to query/configure
the LMH hardware for debug. This driver will register
with the debug interface of the limits interface driver,
which in turn exposes the debugfs interface support.

Change-Id: Ib2b47346f08537e041a2327342a984e3b0b33730
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>