bus: mhi: host: pci_generic: add support for sc8280xp-crd SDX55 variant

The SC8280XP Compute Reference Design (CRD) has an on-PCB SDX55 modem
which uses MBIM.

The exact channel configuration is not known but the Foxconn SDX55
configuration allows the modem to be used so reuse that one for now.

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://lore.kernel.org/r/20221104093913.23347-1-johan+linaro@kernel.org


[mani: modified the subject to format "bus: mhi: host"]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>