soc: qcom: Reset watchdog before setting bite time

Reset watchdog before setting bite time in watchdog panic
handler. If the watchdog’s bite time is reduced below its
current count, there is a possibility that it will bite as
the virtual watchdog sets times relative to the last pet.

Change-Id: I27a456a0f81525987003c7eb54a9e766b6e184ca
Signed-off-by: Komal Bajaj <kbajaj@codeaurora.org>