backend: kvm: Add virtio_pci_modern_dev kernel module
Without this kernel module, kvm backend fails to load virtio_pci module as it looks like virtio_pci has dependency on it. This is snapshot of error which is fixed by this patch:
modprobe: module 'virtio_pci_modern_dev' not found
[ 1.027439] Module has invalid ELF structures
modprobe: 'kernel/drivers/virtio/virtio_pci.ko.xz': unknown symbol in module or invalid parameter