arm64: dts: qcom: Add basic devicetree support for SM8350 SoC

Add basic devicetree support for Qualcomm Technologies, Inc SM8350 SoC.
This adds gcc, pinctrl, reserved memory, uart, cpu nodes for this SoC.
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210127123054.263231-6-vkoul@kernel.org
[bjorn: Adjusted 4th timer interrupt, per input from Sai]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>