kvm: call kvm_arch_destroy_vm if vm creation fails

kvm: call kvm_arch_destroy_vm if vm creation fails

In kvm_create_vm(), if we've successfully called kvm_arch_init_vm(), but
then fail later in the function, we need to call kvm_arch_destroy_vm()
so that it can do any necessary cleanup (like freeing memory).

Fixes: 44a95dae1d229a ("KVM: x86: Detect and Initialize AVIC support")
Signed-off-by: John Sperbeck <[email protected]>
Signed-off-by: Jim Mattson <[email protected]>
Reviewed-by: Junaid Shahid <[email protected]>
[Remove dependency on "kvm: Don't clear reference count on
 kvm_create_vm() error path" which was not committed. - Paolo]
Signed-off-by: Paolo Bonzini <[email protected]>