arm64: dts: qcom: Add Xiaomi Redmi Note 7 (lavender)

This adds the initial device tree support for Xiaomi
Redmi Note 7 (codename lavender) phone. It is based on
SDM660 SoC. Currently it can be booted into initrd with
a shell over UART and you can also get kernel boot logs
from a pstore-ramoops.

Signed-off-by: Alexey Minnekhanov <alexey.min@gmail.com>
Link: https://lore.kernel.org/r/20200417012630.222352-4-alexey.min@gmail.com


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