arm64: dts: qcom: Add msm8916 BLSP device nodes

Add device nodes for SPI1, SPI2, SPI3, I2C4, SPI5, SPI6 and
BAM(DMA) engine connected to them.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: Andy Gross <agross@codeaurora.org>