trace: increase caller depth for preempt/irqs disable events

preempt/irq disable events tracks and prints 4 callers (3 actual callers
and current trace event caller), who disables irqs and preemption for
longer duration. It may not be sufficient for all scenarios, so extend
these events to track 5 callers and exclude current trace event caller.

Change-Id: I464dd738a78d3a89fea62fcf4aaee9897bb03c37
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>