dma: loop_transfer issue on nucleo_wb55rg

[erwango]

Describe the bug
Dma loop_transfer test is failed on nucleo_wb55rg.
After first transfer, selected stream is busy.

To Reproduce
Steps to reproduce the behavior:
Run tests/drivers/dma/loop_transfer on nucleo_wb55rg

Expected behavior
Test should pass

Impact
What impact does this issue have on your progress (e.g., annoyance, showstopper)

Logs and console output

START - test_dma_m2m_loop
DMA memory to memory transfer started on DMAMUX_1
Preparing DMA Controller
Starting the transfer and waiting for 1 second
E: dma stream 4 is busy.
E: cannot configure the dmamux.

    Assertion failed at ../../src/test_dma_loop.c:63: test_transfer: (dma_con)
Not able to config transfer 2