net: ena: resolve WARN_ON when freeing IRQs

When IRQs are freed, a WARN_ON is triggered as the
affinity notifier is not released.
This results in the below stack trace:

[  484.544586]  ? __warn+0x84/0x130
[  484.544843]  ? free_irq+0x5c/0x70
[  484.545105]  ? report_bug+0x18a/0x1a0
[  484.545390]  ? handle_bug+0x53/0x90
[  484.545664]  ? exc_invalid_op+0x14/0x70
[  484.545959]  ? asm_exc_invalid_op+0x16/0x20
[  484.546279]  ? free_irq+0x5c/0x70
[  484.546545]  ? free_irq+0x10/0x70
[  484.546807]  ena_free_io_irq+0x5f/0x70 [ena]
[  484.547138]  ena_down+0x250/0x3e0 [ena]
[  484.547435]  ena_destroy_device+0x118/0x150 [ena]
[  484.547796]  __ena_shutoff+0x5a/0xe0 [ena]
[  484.548110]  pci_device_remove+0x3b/0xb0
[  484.548412]  device_release_driver_internal+0x193/0x200
[  484.548804]  driver_detach+0x44/0x90
[  484.549084]  bus_remove_driver+0x69/0xf0
[  484.549386]  pci_unregister_driver+0x2a/0xb0
[  484.549717]  ena_cleanup+0xc/0x130 [ena]
[  484.550021]  __do_sys_delete_module.constprop.0+0x176/0x310
[  484.550438]  ? syscall_trace_enter+0xfb/0x1c0
[  484.550782]  do_syscall_64+0x5b/0x170
[  484.551067]  entry_SYSCALL_64_after_hwframe+0x76/0x7e

Adding a call to `netif_napi_set_irq` with -1 as the IRQ index,
which frees the notifier.

Fixes: de340d82 ("net: ena: use napi's aRFS rmap notifers")
Signed-off-by: David Arinzon <darinzon@amazon.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Ahmed Zaki <ahmed.zaki@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250317071147.1105-1-darinzon@amazon.com


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