arm64: dts: qcom: sc7280: Flatten usb controller nodes

arm64: dts: qcom: sc7280: Flatten usb controller nodes

Flatten usb controller nodes and update to using latest bindings
and flattened driver approach.

Signed-off-by: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Tested-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> # FP5
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250728035812.2762957-1-krishna.kurapati@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>