arm64: dts: sdm630: Temporarily disable SMMUs by default

arm64: dts: sdm630: Temporarily disable SMMUs by default

There happens to be an issue between how kernel handles
qcom-smmuv2 and how the hypervisor would like it to be
handled. That results in the platform hanging completely
after the SMMUs are probed.

Hence, disable the SMMU nodes temporarily, until the
issue is rectified.

This has been overlooked by me in the initial
porting stage, as my defconfig has SMMU disabled.

Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Link: https://lore.kernel.org/r/20200629222610.168511-1-konradybcio@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>