UPSTREAM: arm64: dts: qcom: sdm845: Add APSS watchdog node

commit ef8576789e869b7584684ae81126a465eb1deeb6 upstream.

Add a node describing the watchdog found in the application subsystem.

Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
(cherry picked from commit ef8576789e869b7584684ae81126a465eb1deeb6)
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I835d512c13c392e356c5190e865c0617e97041c2