spi: dw: Use new spi_xfer_is_dma_mapped() helper

Replace a few lines of code by calling a spi_xfer_is_dma_mapped() helper.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD
Link: https://lore.kernel.org/r/20240531194723.1761567-3-andriy.shevchenko@linux.intel.comTested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-dw-core.c

@@ -19,6 +19,7 @@
 #include <linux/string.h>
 #include <linux/of.h>
 
+#include "internals.h"
 #include "spi-dw.h"
 
 #ifdef CONFIG_DEBUG_FS
@@ -438,8 +439,7 @@ static int dw_spi_transfer_one(struct spi_controller *host,
 	transfer->effective_speed_hz = dws->current_freq;
 
 	/* Check if current transfer is a DMA transaction */
-	if (host->can_dma && host->can_dma(host, spi, transfer))
-		dws->dma_mapped = host->cur_msg_mapped;
+	dws->dma_mapped = spi_xfer_is_dma_mapped(host, spi, transfer);
 
 	/* For poll mode just disable all interrupts */
 	dw_spi_mask_intr(dws, 0xff);