ARM: dts: msm: Add TSENS node for fsm9900 targets

Added a TSENS node in the device tree to support tsens
thermal monitoring for the FSM9900 targets.

Change-Id: Ib1a66236c8e4857b24c43ebf119275cde28fe284
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>