drivers: udc_dwc2: Add helpers to check operating mode

Use helper functions to check whether device is operating in Buffer DMA
or Completer mode. This allows compile time optimizations to remove DMA
handling code when DMA is disabled via KConfig symbol UDC_DWC2_DMA.

Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
1 file changed