x86/hvm: Rename v->arch.hvm_vcpu to v->arch.hvm

x86/hvm: Rename v->arch.hvm_vcpu to v->arch.hvm

The trailing _vcpu suffix is redundant, but adds to code volume.  Drop it.

Reflow lines as appropriate.  No functional change.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>