spi: pxa2xx: Use typedef for dma_filter_fn

Use existing typedef for dma_filter_fn to avoid duplicating type
definition.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: krzk

include/linux/spi/pxa2xx_spi.h

@@ -5,6 +5,7 @@
 #ifndef __LINUX_SPI_PXA2XX_SPI_H
 #define __LINUX_SPI_PXA2XX_SPI_H
 
+#include <linux/dmaengine.h>
 #include <linux/types.h>
 
 #include <linux/pxa2xx_ssp.h>
@@ -22,7 +23,7 @@ struct pxa2xx_spi_controller {
 	bool is_target;
 
 	/* DMA engine specific config */
-	bool (*dma_filter)(struct dma_chan *chan, void *param);
+	dma_filter_fn dma_filter;
 	void *tx_param;
 	void *rx_param;