libqmi support for services with id > 0xff over QRTR

The service id field in the QMUX header is limited to 8 bits, which makes it impossible to use QMI services with an id greater than 0xFF.

In systems with QRTR nodes the QMI communication does not rely on a QMUX header and therefore there is no limitation on the QMI service id value.

Services with values greater than 0xFF are therefore common in Qualcomm SoCs, e.g. in Snapdragon 801 / msm8974:

• main service is 0x100
• power management service is 0x101
• debug data service is 0x107
• debug control service is 0x108 ...

libqmi should allow services with ids greater than 0xFF when the QMUX backend is not used.

See context at:

• #21: Implementation for sensors services
• !346 (merged): data: qmi-service-ssc: add SSC service