dt-bindings: thermal: Add qmi cooling device bindings

Add bindings for qmi cooling device driver. This driver will be used to
register cooling devices in remote subsystem to thermal framework.

Change-Id: I0526aef77ce710da585e5baf5c8745e840bc89c3
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>