MAINTAINERS: IIO: Update reviewers for the subsystem

MAINTAINERS: IIO: Update reviewers for the subsystem

Lars-Peter has not been active in IIO reviewing for some time. Without
David, Nuno and Andy, along with many others who review IIO patches, I
would not be able to keep up with the rate of change and would have
become a bottleneck to development.

Hence update the MAINTAINERS entry to more accurately reflect reality.
This is not intended to give the 3 of them any more work or to oblige
them to review any particular series, so if there are any series waiting
a long time continue to poke me via the list.

Acked-by: Andy Shevchenko <andy@kernel.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250406153120.2129133-1-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>