ARM: dts: msm: Disable ATOS for apps smmu for sm8150

The power collapsible TBUs could miss getting a reset signal,
which would lead to incorrect behavior. This effects the ATOS
functionality. Hence, disable it until a proper workaround is
set in place.

Change-Id: I50ed01406505638ac791ef9b9f728b62765213aa
Signed-off-by: Sudarshan Rajagopalan <sudaraja@codeaurora.org>