arm64: dts: Add ipq5018 SoC and rdp432-c2 board support

Add initial device tree support for the Qualcomm IPQ5018 SoC and
rdp432-c2 board.

Few things like 'reboot' does not work because, couple of more 'SCM'
APIS are needed to clear some TrustZone settings. Those will be
posted separately.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Co-developed-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Co-developed-by: Gokul Sriram Palanisamy <quic_gokulsri@quicinc.com>
Signed-off-by: Gokul Sriram Palanisamy <quic_gokulsri@quicinc.com>
Signed-off-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
Link: https://lore.kernel.org/r/1690533192-22220-6-git-send-email-quic_srichara@quicinc.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>