linux-wandboard

softlockup: increase hung tasks check from 2 minutes to 8 minutes

Andrew says:

> Seems that about 100% of the reports we get of this warning triggering
> are sys_sync, transaction commit, etc.

increase the timeout. If it still triggers for people, we can kill it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>