arm64: dts: qcom: Add industrial mezzanine support for qcs6490-rb3gen2

Add DTS support for Qualcomm qcs6490-rb3gen2 industrial mezzanine board.

Signed-off-by: Sahil Chandna <quic_chandna@quicinc.com>
Signed-off-by: Nirmesh Kumar Singh <quic_nkumarsi@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250323123333.1622860-1-quic_nkumarsi@quicinc.com


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