ARM: dts: qcom: Add SDX55 SoC and MTP board support

Add basic devicetree support for SDX55 SoC and MTP board from Qualcomm.
This basic support includes GCC, RPMh clock, INTC and Debug UART.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>