iio:ad5791: Mark transfer buffers as __be32

Fixes the following warnings from sparse:
	drivers/iio/dac/ad5791.c:114:18: warning: incorrect type in assignment (different base types)
	drivers/iio/dac/ad5791.c:114:18:    expected unsigned int [unsigned] [usertype] d32
	drivers/iio/dac/ad5791.c:114:18:    got restricted __be32 [usertype] <noident>
	drivers/iio/dac/ad5791.c:142:21: warning: incorrect type in assignment (different base types)
	drivers/iio/dac/ad5791.c:142:21:    expected unsigned int [unsigned] [usertype] d32
	drivers/iio/dac/ad5791.c:142:21:    got restricted __be32 [usertype] <noident>
	drivers/iio/dac/ad5791.c:144:21: warning: incorrect type in assignment (different base types)
	drivers/iio/dac/ad5791.c:144:21:    expected unsigned int [unsigned] [usertype] d32
	drivers/iio/dac/ad5791.c:144:21:    got restricted __be32 [usertype] <noident>
	drivers/iio/dac/ad5791.c:148:16: warning: cast to restricted __be32
	drivers/iio/dac/ad5791.c:148:16: warning: cast to restricted __be32
	drivers/iio/dac/ad5791.c:148:16: warning: cast to restricted __be32
	drivers/iio/dac/ad5791.c:148:16: warning: cast to restricted __be32
	drivers/iio/dac/ad5791.c:148:16: warning: cast to restricted __be32
	drivers/iio/dac/ad5791.c:148:16: warning: cast to restricted __be32

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c
index d64acbd89482..1e7f4cd7db83 100644
--- a/drivers/iio/dac/ad5791.c
+++ b/drivers/iio/dac/ad5791.c
@@ -107,7 +107,7 @@ enum ad5791_supported_device_ids {
 static int ad5791_spi_write(struct spi_device *spi, u8 addr, u32 val)
 {
         union {
-                u32 d32;
+                __be32 d32;
                 u8 d8[4];
         } data;
 
@@ -121,7 +121,7 @@ static int ad5791_spi_write(struct spi_device *spi, u8 addr, u32 val)
 static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val)
 {
         union {
-                u32 d32;
+                __be32 d32;
                 u8 d8[4];
         } data[3];
         int ret;