iio: linux/iio.h: fix Excess kernel-doc description warning

Remove the @of_xlate: lines to prevent the kernel-doc warning:

include/linux/iio/iio.h:534: warning: Excess struct member 'of_xlate' description in 'iio_info'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-iio@vger.kernel.org
Link: https://lore.kernel.org/r/20231223050556.13948-1-rdunlap@infradead.org


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>