virt_plat_dev: Register the virt platform device driver

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8K8HP


CVE: NA

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This driver porbed the virt platform device by name, and
it just take up a few MSIs through the vp_irqdomain.

Signed-off-by: wanghaibin <wanghaibin.wang@huawei.com>
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
Signed-off-by: Dongxu Sun <sundongxu3@huawei.com>