Newer Huawei modems use ^HCSQ to report per-interface signal quality values,
but we don't know yet what each field means for each technology, so just ignore
them for now.
E.g.:
^HCSQ: "GSM", 53
^HCSQ: "WCDMA", 26, 24, 43
^HCSQ: "LTE", 40, 28, 216, 14
We also don't use this message to update current access technology information,
as it is not detailed enough (e.g. WCDMA doesn't specify whether it's plain UMTS
or HSDPA or HSPA+...)
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