spi: dw: Move num-of retries parameter to the header file

The parameter will be needed for another wait-done method being added in
the framework of the SPI memory operation modification in a further
commit.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Link: https://lore.kernel.org/r/20201007235511.4935-16-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-dw-dma.c

@@ -17,7 +17,6 @@
 
 #include "spi-dw.h"
 
-#define WAIT_RETRIES	5
 #define RX_BUSY		0
 #define RX_BURST_LEVEL	16
 #define TX_BUSY		1
@@ -240,7 +239,7 @@ static inline bool dw_spi_dma_tx_busy(struct dw_spi *dws)
 static int dw_spi_dma_wait_tx_done(struct dw_spi *dws,
 				   struct spi_transfer *xfer)
 {
-	int retry = WAIT_RETRIES;
+	int retry = SPI_WAIT_RETRIES;
 	struct spi_delay delay;
 	u32 nents;
 
@@ -324,7 +323,7 @@ static inline bool dw_spi_dma_rx_busy(struct dw_spi *dws)
 
 static int dw_spi_dma_wait_rx_done(struct dw_spi *dws)
 {
-	int retry = WAIT_RETRIES;
+	int retry = SPI_WAIT_RETRIES;
 	struct spi_delay delay;
 	unsigned long ns, us;
 	u32 nents;

drivers/spi/spi-dw.h

@@ -100,6 +100,8 @@
 #define SPI_DMA_RDMAE			(1 << 0)
 #define SPI_DMA_TDMAE			(1 << 1)
 
+#define SPI_WAIT_RETRIES		5
+
 enum dw_ssi_type {
 	SSI_MOTO_SPI = 0,
 	SSI_TI_SSP,