cleanup domain builder declarations and related users

cleanup domain builder declarations and related users

There are several unused function and structure declarations in the
hypervisor related to domain building. Remove them.

Use an enum for elf_dom_parms.pae instead of just hard coding the
values when setting the information and adjust the code to use those
instead of own macros (hypervisor and tools).

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