iio: adc: ad7173: Remove index from temp channel

Temperature channel is unique per device, index is not needed.
This is breaking userspace: Include fixes tag to be released within the
same rc cycle.

Fixes: 76a1e6a4 ("iio: adc: ad7173: add AD7173 driver")
Signed-off-by: Dumitru Ceclan <dumitru.ceclan@analog.com>
Link: https://lore.kernel.org/r/20240521-ad7173-fixes-v1-3-8161cc7f3ad1@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ad7173.c

@@ -815,7 +815,6 @@ static const struct iio_chan_spec ad7173_channel_template = {
 
 static const struct iio_chan_spec ad7173_temp_iio_channel_template = {
 	.type = IIO_TEMP,
-	.indexed = 1,
 	.channel = AD7173_AIN_TEMP_POS,
 	.channel2 = AD7173_AIN_TEMP_NEG,
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |