* [SDK][VIRTIO][NETKVM] Make VirtIO a separate library
This is to avoid code duplication when more VirtIO drivers are brought in. This will also be used on development of a VirtIO XDDM GPU Driver.
* [VIRTIO] Sync with upstream
Not all files are included, but these are necessary to compile cdrom driver.
So far it can only be statically linked with drivers, a proper
implementation requires wdfldr helper driver
