arm64: dts: qcom: msm8996: xiaomi-gemini: Add support for Xiaomi Mi 5

Add a device tree for Xiaomi Mi 5 (gemini).

Signed-off-by: Raffaele Tranquillini <raffaele.tranquillini@gmail.com>
Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210901193214.250375-5-y.oudjana@protonmail.com