iio: adc: mp2629: fix wrong comparison of channel

stable inclusion
from stable-v5.10.156
commit 46b8bc62c5ea20416a7dd9778624924304922a51
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7MCG1

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=46b8bc62c5ea20416a7dd9778624924304922a51

--------------------------------

commit 1eb20332 upstream.

Input voltage channel enum is compared against iio address instead
of the channel.

Fixes: 7abd9fb6 ("iio: adc: mp2629: Add support for mp2629 ADC driver")
Signed-off-by: NSaravanan Sekar <sravanhome@gmail.com>
Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20221029093000.45451-2-sravanhome@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Nsanglipeng <sanglipeng1@jd.com>
(cherry picked from commit 0c1e4e81)

drivers/iio/adc/mp2629_adc.c

@@ -73,7 +73,7 @@ static int mp2629_read_raw(struct iio_dev *indio_dev,
 		if (ret)
 			return ret;
 
-		if (chan->address == MP2629_INPUT_VOLT)
+		if (chan->channel == MP2629_INPUT_VOLT)
 			rval &= GENMASK(6, 0);
 		*val = rval;
 		return IIO_VAL_INT;