dt-bindings: msm: arm: Add bindings for hid-qvr

Add compatible string used by hid-qvr driver to register and
deliver events received from the external viewer to the remote
processor.

Change-Id: Ib03c505049367c010fd999a254966501fbbb5867
Signed-off-by: Sathish Ambley <sathishambley@codeaurora.org>