Service_USB 2 - Release USB device configuration setting
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## Name

Service_USB 2 - Release USB device configuration setting — Application request to release USB device configuration setting

## On Entry

R0 | 2 (reason code)
R1 | &80C00 (USB Service call)
R2 | Pointer to controller structure
R3 | Pointer to device structure

## On Exit

All registers preserved to pass on, else

R0 | 0 to refuse access or 1 to cause a re-try later.
R1 | 0 to claim or preserved to pass on.
R2, R3 | preserved

## Use

Must be broadcast by an application which wants to change the configuration of device to inform other applications using the device. If rejected with a 1 result the application may wait for a Service_USB 0 and can afterwards retry to do the change.

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