[PROBLEM] bus: mhi: host: pci_generic: SDX24 Channels

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Hello,

Module: Quectel EM120R-GL

This module does not appear to work fully with the default SDX24 configuration.
It appears to be another variant of the EM120R-GL (Also FCC-Locked by default).

Issues:
- Debug ports are missing (AT)
- It only works over MBIM/QMI with Qualcomm's RMNET driver.
- In QMI mode it's really unstable and unpredictable with the QMI port
freezing up.

Are there any missing channels in the SDX24 config or is this a hw/vendor issue.
When using Quectel's drivers (and blacklisting mhi_pci_generic), all
the ports are available.
The configuration for other variants of the same module brings up the
AT port ( with a recurring warning/error).

>> [ 5074.472791] sequence number glitch prev=1 curr=0


mhi_qcom_sdx24_info
==================

lspci: 0003:01:00.0 Unassigned class [ff00]: Qualcomm Technologies,
Inc SDX24 [Snapdragon X24 4G] [17cb:0304]

ports: mhi_hwip0 (net), mhi_swip0 (net), wwan2mbim0 (mbim), wwan2qcdm0
(ignored), wwan2qmi0 (qmi)


mhi_quectel_em1xx_info
===================

lspci: 0003:01:00.0 Unassigned class [ff00]: Qualcomm Technologies,
Inc SDX24 [Snapdragon X24 4G] [17cb:0304]

ports: wwan0 (net), wwan0at0 (at), wwan0mbim0 (mbim), wwan0qcdm0 (ignored)




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