arch, pci, vmm: Initial switch to the hypervisor crate

Start moving the vmm, arch and pci crates to being hypervisor agnostic
by using the hypervisor trait and abstractions. This is not a complete
switch and there are still some remaining KVM dependencies.

Signed-off-by: Muminul Islam <muislam@microsoft.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

Cargo.lock

@@ -57,8 +57,10 @@ name = "arch"
 version = "0.1.0"
 dependencies = [
  "acpi_tables",
+ "anyhow",
  "arch_gen",
  "byteorder",
+ "hypervisor",
  "kvm-bindings",
  "kvm-ioctls",
  "libc",
@@ -716,8 +718,7 @@ dependencies = [
  "anyhow",
  "byteorder",
  "devices",
- "kvm-bindings",
- "kvm-ioctls",
+ "hypervisor",
  "libc",
  "log 0.4.8",
  "serde",
@@ -1574,8 +1575,7 @@ dependencies = [
  "credibility",
  "devices",
  "epoll",
- "kvm-bindings",
- "kvm-ioctls",
+ "hypervisor",
  "lazy_static",
  "libc",
  "linux-loader",