ARM: dts: msm: Remove bogus stream ID from PCIe IOMMU

There's currently a placeholder stream ID of "1" in the PCIe RC device
tree node.  The PCIe RC doesn't actually attach and doesn't need a
stream ID though, the "1" was put there to get around an error caused by
the fact that #iommu-cells was equal to 1 for the anoc1_smmu, even
though it should have actually been 0.

Fix all this by making #iommu-cells = <0> for the anoc1 SMMU and
removing the bogus placeholder stream ID.

CRs-Fixed: 1036401
Change-Id: I73ff6d6b081b1ee00c8e8ebea42e86160b35aa37
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>