media: v4l2: Fix v4l2_i2c_subdev_set_name function documentation

stable inclusion
from stable-v5.10.153
commit 4953a989b72d2b809b18dde7a4c2844cba4232d4
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I64YCA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4953a989b72d2b809b18dde7a4c2844cba4232d4



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

[ Upstream commit bb9ea2c3 ]

The doc says the I²C device's name is used if devname is NULL, but
actually the I²C device driver's name is used.

Fixes: 06582930 ("media: v4l: subdev: Add a function to set an I²C sub-device's name")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Lipeng Sang <sanglipeng1@jd.com>