arm64: dts: ti: Add DT overlay for PCIe + USB3.0 SERDES personality card

Add overlay for PCIe (uses the second instance of PCIe in AM654x) and
USB3.0 SERDES personality card

The PCIe3/USB3 card is provided with the AM65x GP EVM configuration [1]
so apply the overlay to k3-am654-gp-evm.dtb

[1] https://www.ti.com/lit/ug/spruim7/spruim7.pdf

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240208-for-v6-9-am65-overlays-2-0-v2-3-70bae3e91597@kernel.org
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>