net: lan966x: Make sure to release ptp interrupt

When the lan966x driver is removed make sure to remove also the ptp_irq
IRQ.

Fixes: e85a96e4

 ("net: lan966x: Add support for ptp interrupts")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Link: https://lore.kernel.org/r/20220413195716.3796467-1-horatiu.vultur@microchip.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>