ARM: dts: msm: Add coherent test devices and update sids for sm6150

Add iommu test devices which are dma-coherent and update sids for
test devices as per configuration settings for kgsl and apps smmu
for sm6150.

Change-Id: I7112326efb3c79e97f8e5e7e89de42157aa94939
Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org>