defconfig: msm: increase panic_timeout value to 5 second for lito

During APSS shutdown, notification is send to modem
subsystem for completing cleanup callbacks and
preparing for minidump segments. Current delay of
200ms is not enough for modem to complete cleanup
and complete minidump preparation.

Increase panic_timeout to allow modem for completion
of cleanup and dump preparation.

Change-Id: If883527642ef8eb06804c01600f2d705241d785f
Signed-off-by: Prateek Sood <prsood@codeaurora.org>