[FS#1252] No IP Assigned to Interface with QMI on Quectel EC-25A

[LEDE Bugs]

The following task has a new comment added:

FS#1252 - No IP Assigned to Interface with QMI on Quectel EC-25A
User who did this - Evren Yurtesen (yurtesen)

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This card works for me with latest code if I disable autoconnect with `uqmi -d /dev/cdc-wdm0 --stop-network 4294967295 --autoconnect` using information from "John Marrett commented on 04.01.2018 15:20"

But, out of the box, it did not receive IP address in QMI mode and I spent hours trying to figure out why it didn't work. I think `qmi.sh` should disable autoconnect perhaps?
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1252#comment4167