arm64: dts: qcom: Add SM8450 HDK DTS

This adds the base HDK DTS along with the usb, ufs and regulators found
in this board

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220203090031.3128702-2-vkoul@kernel.org