soc: qcom: watchdog_v2: use cluster0 wdog for both clusters

There are two watchdog timers one per cluster but either can be used for
both clusters if the other is disabled. Use cluster0 watchdog for both
clusters by disabling the cluster1 watchdog.

Change-Id: I45d0ab7b78ec8474a9c5f4705a5c7be92e7dae05
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>