[PATCH -next] iio: dac: ad5758: remove set but not used variable 'dc_dc_mode'

[Yue Haibing]

From: YueHaibing <yuehaib...@huawei.com>

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/iio/dac/ad5758.c: In function ad5758_write_powerdown:
drivers/iio/dac/ad5758.c:585:15: warning: variable dc_dc_mode set but not used 
[-Wunused-but-set-variable]

It is not used any more since
commit edde945257e2 ("iio: dac: ad5758: Modifications for new revision")

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/iio/dac/ad5758.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/iio/dac/ad5758.c b/drivers/iio/dac/ad5758.c
index a513c70..570f69e 100644
--- a/drivers/iio/dac/ad5758.c
+++ b/drivers/iio/dac/ad5758.c
@@ -582,7 +582,7 @@ static ssize_t ad5758_write_powerdown(struct iio_dev 
*indio_dev,
 {
        struct ad5758_state *st = iio_priv(indio_dev);
        bool pwr_down;
-       unsigned int dc_dc_mode, dac_config_mode, val;
+       unsigned int dac_config_mode, val;
        unsigned long int dac_config_msk;
        int ret;
 
@@ -591,13 +591,10 @@ static ssize_t ad5758_write_powerdown(struct iio_dev 
*indio_dev,
                return ret;
 
        mutex_lock(&st->lock);
-       if (pwr_down) {
-               dc_dc_mode = AD5758_DCDC_MODE_POWER_OFF;
+       if (pwr_down)
                val = 0;
-       } else {
-               dc_dc_mode = st->dc_dc_mode;
+       else
                val = 1;
-       }
 
        dac_config_mode = AD5758_DAC_CONFIG_OUT_EN_MODE(val) |
                          AD5758_DAC_CONFIG_INT_EN_MODE(val);
-- 
2.7.4