[RFC 4/9] spi: spi-imx: spi_imx_buf_rx_swap_u32(): fix sparse warning

[Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>]

This patch fixes the following sparse warning by using a swab32()
instead of a cpu_to_be32(). The driver is used on little endian
systems only and we really want to swap the bytes.

| drivers/spi/spi-imx.c:305:29: warning: incorrect type in assignment (different base types)
| drivers/spi/spi-imx.c:305:29:    expected unsigned int val
| drivers/spi/spi-imx.c:305:29:    got restricted __be32 [usertype]
| drivers/spi/spi-imx.c:361:21: warning: incorrect type in assignment (different base types)
| drivers/spi/spi-imx.c:361:21:    expected unsigned int [assigned] [usertype] val
| drivers/spi/spi-imx.c:361:21:    got restricted __be32 [usertype]

Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
 drivers/spi/spi-imx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index a05d823d8806..a63cb26f33fc 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -297,7 +297,7 @@ static void spi_imx_buf_rx_swap_u32(struct spi_imx_data *spi_imx)
 #ifdef __LITTLE_ENDIAN
 		bytes_per_word = spi_imx_bytes_per_word(spi_imx->bits_per_word);
 		if (bytes_per_word == 1)
-			val = cpu_to_be32(val);
+			val = swab32(val);
 		else if (bytes_per_word == 2)
 			val = (val << 16) | (val >> 16);
 #endif
@@ -353,7 +353,7 @@ static void spi_imx_buf_tx_swap_u32(struct spi_imx_data *spi_imx)
 	bytes_per_word = spi_imx_bytes_per_word(spi_imx->bits_per_word);
 
 	if (bytes_per_word == 1)
-		val = cpu_to_be32(val);
+		val = swab32(val);
 	else if (bytes_per_word == 2)
 		val = (val << 16) | (val >> 16);
 #endif
-- 
2.35.1