pine64-pinephone: reset modem after applying configuration (!978)
The datasheet says that the AT+QDAI audio routing configuration is saved to non-volatile memory directly, and therefore needs a modem reset to be applied. This commits changes the audio routing configuration script to first check for the current configuration, and only change it if it is different from the one wanted. The new configuration is then sent, and modem is reset to apply configuration.
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