arm64: dts: qcom: qcs8300-ride: enable ethernet0

Enable the SerDes PHY on qcs8300-ride. Add the MDC and MDIO pin functions
for ethernet0 on qcs8300-ride. Enable the ethernet port on qcs8300-ride.

Signed-off-by: Yijie Yang <quic_yijiyang@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20241206-dts_qcs8300-v5-2-422e4fda292d@quicinc.com


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