bus: mhi: host: pci_generic: Add support for Quectel RM520N-GL modem

Add MHI interface definition for RM520 product based on Qualcomm SDX6X chip

Signed-off-by: Duke Xin(辛安文) <duke_xinanwen@163.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://lore.kernel.org/r/20230630062318.12114-1-duke_xinanwen@163.com


Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>