iommu/arm-smmu-qcom: Consstently initialize stream mappings

Firmware that traps writes to S2CR to translate BYPASS into FAULT also
ignores writes of type FAULT. As such booting with "disable_bypass" set
will result in all S2CR registers left as configured by the bootloader.

This has been seen to result in indeterministic results, as these
mappings might linger and reference context banks that Linux is
reconfiguring.

Use the fact that BYPASS writes result in FAULT type to force all stream
mappings to FAULT.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Message-Id: <20200709050145.3520931-5-bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>