arch: Switch to hypervisor crate

Removed the dependency on kvm-bindings and kvm-ioctls, use hypervisor
crate instead.

Signed-off-by: Michael Zhao <michael.zhao@arm.com>

arch/src/aarch64/mod.rs

@@ -17,6 +17,7 @@ pub mod regs;
 pub use self::fdt::DeviceInfoForFDT;
 use crate::DeviceType;
 use crate::RegionType;
+use hypervisor::kvm::kvm_bindings;
 use std::collections::HashMap;
 use std::ffi::CStr;
 use std::fmt::Debug;