arm64: dts: qcom: sdm845: Fix the slimbam DMA engine compatible string

As per documentation, Qualcomm SDM845 SoC supports SLIMBAM DMA
engine v1.7.4, so use the correct compatible strings.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230526192210.3146896-5-bhupesh.sharma@linaro.org