Variable is being deinitialized without being initialized

In the file "sl_mic_i2s.c", `dma_channel_right` is only initialised when a specific condition is met, but during deinitialization, the same condition is not checked before the deinit command, thereby, it is breaking other things in the application.


https://github.com/SiliconLabs/simplicity_sdk/blob/8f6a3891926a72fb39b8bdf3dd123cb27476557f/hardware/driver/mic/src/sl_mic_i2s.c#L223C3-L223C40