xen/domain: Call lock_profile_deregister_struct() from common code

xen/domain: Call lock_profile_deregister_struct() from common code

lock_profile_register_struct() is called from common code, but the matching
deregister was previously only called from x86 code.

The practical upshot of this when using CONFIG_LOCK_PROFILE, destroyed domains
on ARM (and in particular, the freed page behind struct domain) remain on the
lockprofile linked list, which will become corrupt when the page is reused.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>