drivers: usb: nrf5: Fix ISO IN/OUT SOF handling

For ISOOUT transaction, check if the buffer is empty before starting
the DMA and for ISOIN case check if the buffer is available to start
the DMA for IN transaction. This handling was swapped. So, handle it
accordingly.

Signed-off-by: Sundar Subramaniyan <sundar.subramaniyan@gmail.com>
1 file changed