arm64: dts: qcom: msm8996-xiaomi-natrium: Add support for Xiaomi Mi 5s Plus

Add the device tree for Xiaomi Mi 5s Plus (natrium).

Signed-off-by: Alec Su <ae40515@yahoo.com.tw>
Reviewed-by: Yassine Oudjana <y.oudjana@protonmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220606024706.22861-3-ae40515@yahoo.com.tw