iio: adc: vf610: fix conversion mode sysfs node name

stable inclusion
from stable-v5.10.127
commit a547662534ca62e70c41ee36776ec4008f836268
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5XDDK

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=a547662534ca62e70c41ee36776ec4008f836268

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

[ Upstream commit f1a633b1 ]

The documentation missed the "in_" prefix for this IIO_SHARED_BY_DIR
entry.

Fixes: bf04c1a3 ("iio: adc: vf610: implement configurable conversion modes")
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Acked-by: NHaibo Chen <haibo.chen@nxp.com>
Link: https://lore.kernel.org/r/560dc93fafe5ef7e9a409885fd20b6beac3973d8.1653900626.git.baruch@tkos.co.ilSigned-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>

Documentation/ABI/testing/sysfs-bus-iio-vf610

-What:		/sys/bus/iio/devices/iio:deviceX/conversion_mode
+What:		/sys/bus/iio/devices/iio:deviceX/in_conversion_mode
 KernelVersion:	4.2
 Contact:	linux-iio@vger.kernel.org
 Description: