Revert "msm: ipa: handle missing interrupts"

This reverts commit c20a9869.

Actual fix was mainline using commit
I3907ea1750ceaece42c8b3ca0f63850e2d7d7f3e, so reverting 
workaround gerrit.

Change-Id: I1ba0e3d7004eb8c33b9c295f9a72098988588b4a
Acked-by: Ashok Vuyyuru <avuyyuru@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>