defconfig: msm: enable CONFIG_PANIC_ON_SCHED_BUG

Trigger panics along with all "BUG:" prints from the scheduler
core, including "scheduling while atomic", and "sleeping from
invalid context."

Change-Id: Id310ef51ef818c21df0c2a3b63679cbab9992f1f
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>