ARM: dts: lan966x: kontron-d10: add PHY interrupts

With interrupt handling fixed in the MaxLinear PHY driver, see commit
97a89ed1 ("net: phy: mxl-gpy: disable interrupts on GPY215 by
default"), we can finally add the correct interrupt description to the
device tree.

Signed-off-by: Michael Walle <mwalle@kernel.org>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230616-feature-d10-dt-cleanups-v1-3-50dd0452b8fe@kernel.org