soc: qcom: watchdog_v2: Add support to trigger watchdog bite on panic

In certain cases during a kernel panic,the interrupts on non-panicking
CPUs are disabled. Since CPU context cannot be collected by sending IPI
to those CPUs, we're limited to debug the problem. Forcing a watchdog
bite during kernel panic will ensure us getting the proper CPU context.
Hence adding support for the same.

Change-Id: Id06030d9bc46d94209da7f0ef8c47bfd3477baf6
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>