arm64: dts: qcom: sdm630: Add sdm630 dts file

Add devicetree files for SDM630 SoC and its pin configuration.
This commit adds basic nodes like cpu, psci and other required
configuration for booting up from eMMC to the serial console.
Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Link: https://lore.kernel.org/r/20200622192558.152828-5-konradybcio@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>