dt-bindings: iio: imu: icm42600: add interrupt naming support

Add interrupt-names field for specifying interrupt pin configured.

Chips are supporting up to 2 interrupt pins with configurable interrupt
sources. Change interrupt to support 1 or 2 entries.

Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20250410-iio-imu-inv-icm42600-rework-interrupt-using-names-v4-1-19e4e2f8f7eb@tdk.com


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