ARM: Tegra: Utilize burst policy for LP1 wakeup

Running SCLK from CLKS makes LP1 wakeup latencies horrible.
However, we can utilize IRQ bursting to switch automatically
to CLKM upon LP1 wakeup IRQ. This maintains low power for LP1
but improves wakeup latencies significantly.

Bug 1423099

Change-Id: I9231d736c5d330a1c36a38a4e2ad1d0b29a4c158
Signed-off-by: Martin Chi <mchi@nvidia.com>
Reviewed-on: http://git-master/r/344607
Reviewed-on: http://git-master/r/350636
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit