arm64: dts: sm8150: add the QUPv3 high-speed UART node

Add the high-speed UART node to the dtsi for sm8150.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230309143551.200694-2-brgl@bgdev.pl