arm64: dts: ls104x: use a pseudo-bus to constrain usb dma size

arm64: dts: ls104x: use a pseudo-bus to constrain usb dma size

Wrap the usb controllers in an intermediate simple-bus and use it to
constrain the dma address size of these usb controllers to the 40 bits
that they generate toward the interconnect.
This is required because the SoC uses 48 bits address sizes and this
mismatch would lead to smmu context faults because the usb generates
40-bit addresses while the smmu page tables are populated with 48-bit
wide addresses.

Suggested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>