arm64: dts: qcom: Add qcs6490-rubikpi3 board dts

arm64: dts: qcom: Add qcs6490-rubikpi3 board dts

Add DTS for Thundercomm qcs6490-rubikpi3 board which uses
QCS6490 SoC.

Works:
- Bluetooth (AP6256)
- Wi-Fi (AP6256)
- Ethernet (AX88179B connected to UPD720201)
- Two USB Type-A 3.0 ports (UPD720201 connected to PCIe0)
- USB Type-A 2.0 port
- USB Type-C
- M.2 M-Key 2280 PCIe 3.0
- FAN
- RTC
- 40PIN: I2C x1, UART x1

Signed-off-by: Hongyang Zhao <hongyang.zhao@thundersoft.com>
Reviewed-by: Roger Shimizu <rosh@debian.org>
Reviewed-by: Christopher Obbard <christopher.obbard@linaro.org>
Tested-by: Christopher Obbard <christopher.obbard@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20251126-rubikpi-next-20251125-v7-2-e46095b80529@thundersoft.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>