ARM: dts: msm: enable auto freeze feature in watchdog

There is auto freeze feature in hardware where Non secure watchdog
freezes automatically when all online cores are in suspend and
unfreezes watchdog upon wakeup event from low power mode. Enable this
feature to protect suspend / resume path by Non secure watchdog.

Change-Id: If0514bb50426852fe91e86050f26043c8a87b40a
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>