Foxconn SDX55 T77W175 device is working in PCIe mode normally.
You can find it in drivers/bus/mhi/pci_geneirc.c file.
But in some scenario, we need to capture the memory dump once it crashed.[...]
So a diag port driver is needed.
Signed-off-by: Slark Xiao <slark_xiao@xxxxxxx>