KVM: VMX: Move RESET-only VMWRITE sequences to init_vmcs()

Move VMWRITE sequences in vmx_vcpu_reset() guarded by !init_event into
init_vmcs() to make it more obvious that they're, uh, initializing the
VMCS.

No meaningful functional change intended (though the order of VMWRITEs
and whatnot is different).

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-44-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>