virtio-gpu: add virtio-gpu-pci module

Build virtio-gpu pci devices modular.  Must be a separate module because
not all qemu softmmu variants come with PCI support.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20201023064618.21409-2-kraxel@redhat.com
2 files changed