dma: dw: allow to stop in DW_DMA_SUSPENDED state

Allow DMA channel to be stopped even if it is in suspended state.
The current code in dw_dma_stop() supports this, but the recently
added early check for dw_dma_is_enabled() results in DMA stop
sequence to be skipped if the channel was in suspended state.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

drivers/dma/dma_dw_common.c

@@ -525,7 +525,7 @@ int dw_dma_stop(const struct device *dev, uint32_t channel)
 		goto out;
 	}
 
-	if (!dw_dma_is_enabled(dev, channel)) {
+	if (!dw_dma_is_enabled(dev, channel) && chan_data->state != DW_DMA_SUSPENDED) {
 		goto out;
 	}