defconfig: Increase notification timeout for sm6150

Extend timeouts for sysmon communication and subsystem
notifier timeouts from 10 seconds to 20 seconds to allow
more time for callbacks that may wait for their own events
with their own timeouts.

Change-Id: Ifa6bc61a964b1399a5a12c60ead75748d44f0694
Signed-off-by: Prateek Sood <prsood@codeaurora.org>