dmaengine: stm32-dma: Fix redundant call to platform_get_irq

Commit c6504be5 ("dmaengine: stm32-dma: Fix unsigned variable compared
with zero") duplicated the call to platform_get_irq.
So remove the first call to platform_get_irq.

Fixes: c6504be5 ("dmaengine: stm32-dma: Fix unsigned variable compared with zero")
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/stm32-dma.c

@@ -1366,7 +1366,6 @@ static int stm32_dma_probe(struct platform_device *pdev)
 
 	for (i = 0; i < STM32_DMA_MAX_CHANNELS; i++) {
 		chan = &dmadev->chan[i];
-		chan->irq = platform_get_irq(pdev, i);
 		ret = platform_get_irq(pdev, i);
 		if (ret < 0)  {
 			if (ret != -EPROBE_DEFER)