hypervisor: Move msr and msr_data macro to arch/x86

Currently these two macros(msr, msr_data) reside both on kvm and mshv
module. Definition is same for both module. Moving them to arch/x86
module eliminates redundancy and makes more sense.

Signed-off-by: Muminul Islam <muislam@microsoft.com>

hypervisor/src/arch/mod.rs

@@ -14,4 +14,5 @@
 pub mod emulator;
 
 #[cfg(target_arch = "x86_64")]
+#[macro_use]
 pub mod x86;