arm64: dts: qcom: sm6125: Add support for Sony Xperia 10II

This commits add support for Sony Xperia 10II based on the SM6125 SoC.

Currently working features:
- dmesg output to bootloader preconfigured display
- USB
- eMMC
- Volume down button

Signed-off-by: Martin Botka <martin.botka@somainline.org>
Link: https://lore.kernel.org/r/20210621195308.654587-2-martin.botka@somainline.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>