MAINTAINERS: Update Analog Devices IIO drivers entry

MAINTAINERS: Update Analog Devices IIO drivers entry

Lars-Peter Clausen is currently busy and is therefore removed from the
ANALOG DEVICES INC IIO DRIVERS entry, with input from Jonathan.

Add Analog Devices mailing list as contact and Nuno Sá as maintainer
for the ANALOG DEVICES INC IIO DRIVERS entry for coverage support.

Suggested-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>