arm64: dts: qcom: qcs615: Add support for secondary USB node on QCS615

Add support for secondary USB controller and its high-speed phy
on QCS615.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>
Co-developed-by: Song Xue <quic_songxue@quicinc.com>
Signed-off-by: Song Xue <quic_songxue@quicinc.com>
Link: https://lore.kernel.org/r/20241218-add_usb_host_mode_for_qcs615-v3-1-d9d29fe39a4b@quicinc.com


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