usb: cdnsp: Add support for device-only configuration

usb: cdnsp: Add support for device-only configuration

This patch introduces support for operating the Cadence USBSSP (cdnsp)
controller in a peripheral-only mode, bypassing the Dual-Role Device (DRD)
logic.

The change in BAR indexing (from BAR 2 to BAR 1) is a direct
consequence of switching from 64-bit to 32-bit addressing in the
Peripheral-only configuration.

Tested on PCI platform with Device-only configuration. Platform-side
changes are included to support the PCI glue layer's property injection.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # pci_ids.h
Link: https://patch.msgid.link/20260331-device_only-v1-1-00378b80365c@cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>