defconfig: sdm855: Enable watchdog bite on panic

Enable QCOM_FORCE_WDOG_BITE_ON_PANIC flag. This is needed to
collect CPU context on kernel panic.

Change-Id: Id0208e9dd564f1f10fe155938d9f7d577190507c
Signed-off-by: Satyajit Desai <sadesai@codeaurora.org>
Signed-off-by: Runmin Wang <runminw@codeaurora.org>