virtio: net: deduplicate handling deferred frames
virtio: net: deduplicate handling deferred frames

Signed-off-by: Ioana Chirca <51e21bdf954d6b11fbd2d2711e2dc884c81ba324@amazon.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker