thermal: lmh-dcvsh: Notify and trace the hardware frequency limit

Enable the LMH-DCVSh feature to listen for hardware freqeuncy request
interrupt. LMH-DCVSh driver will listen for interrupt from the LMH-DCVSh
hardware, which is sent when there is a new frequency request to OSM.
LMH-DCVSh will read the new frequency request, notify the scheduler, print
trace event and then poll for the subsequent frequency request till there
is no request.

Change-Id: I80b7bbdb82a1d42b21b40bf997edf5e73ec9ea8c
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>