[PATCH] spi: stm32: Use NULL instead of 0 for pointer

[Krzysztof Kozlowski]

Pointers should use NULL instead of explicit '0', as pointed out by
sparse:

  spi-stm32.c:1659:65: warning: Using plain integer as NULL pointer

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at oss.qualcomm.com>
---
 drivers/spi/spi-stm32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index b99de8c4cc99..38f6bba38b07 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -1656,7 +1656,7 @@ static int stm32_spi_transfer_one_dma(struct stm32_spi *spi,
 			ret = stm32_spi_prepare_rx_dma_mdma_chaining(spi, xfer, &rx_dma_conf,
 								     &rx_dma_desc, &rx_mdma_desc);
 			if (ret) { /* RX DMA MDMA chaining not possible, fallback to DMA only */
-				rx_dma_conf.peripheral_config = 0;
+				rx_dma_conf.peripheral_config = NULL;
 				rx_dma_desc = NULL;
 			}
 		}
-- 
2.51.0