defconfig: arm64: Enable BOOTPARAM_HUNG_TASK_PANIC flag for sdm855

Enable config BOOTPARAM_HUNG_TASK_PANIC flag for sdm855, so that
kernel to panic on "hung tasks", which are bugs that cause the
kernel to leave a task stuck in uninterruptible "D" state.

Change-Id: I0c116c98dbfc036f102b0bf0822cba558fac96ce
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>