Revert "Mark HI and TASKLET softirq synchronous"

This reverts commit 3c53776e.
Reverting the change to match what we have on previous Kernels.

Change-Id: I4af64cd7e2c4291dda5f503bf2d74ede459a76c6
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>