media: radio-wl1273: Rename wl1273_fm_vidioc_s_ctrl

Now that vidioc_s_ctrl is gone we want to remove that string from all
the codebase.

Besides, it isn't the correct name of this function anyway. It's clearly a
left-over from the past.

Suggested-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>