media: core: v4l2-ioctl.c: use is_valid_ioctl()

In most cases the is_valid_ioctl() macro is used to check if an ioctl is
valid, except in one place. Use it there as well as it makes the code
easier to read.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
1 file changed