arm64: dts: ti: k3-am69-sk: Add USB SuperSpeed support

arm64: dts: ti: k3-am69-sk: Add USB SuperSpeed support

AM69 SK board has two stacked USB3 connectors:
   1. USB3 (Stacked TypeA + TypeC)
   2. USB3 TypeA Hub interfaced through TUSB8041.

The board uses SERDES0 Lane 3 for USB3 IP. So update the
SerDes lane info for PCIe and USB. Add the pin mux data
and enable USB 3.0 support with its respective SERDES settings.

Signed-off-by: Dasnavis Sabiya <sabiya.d@ti.com>
Signed-off-by: Enric Balletbo i Serra <eballetb@redhat.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20250108-am69sk-dt-usb-v3-1-bb4981534754@redhat.com
Signed-off-by: Nishanth Menon <nm@ti.com>