iio:light:ltr501: White space cleanup of spacing around {} in id tables

The spacing in this driver was inconsistent so make sure we have a space
after { and before } for the two id tables.
Part of aim is to avoid providing examples of this inconsistency that
get copied into new drivers.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Nikita Travkin <nikita@trvn.ru>
Cc: Maslov Dmitry <maslovdmitry@seeed.cc>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Link: https://lore.kernel.org/r/20211230174911.78291-6-jic23@kernel.org