Sepherosa Ziehau 19605ff758 xen: Set ipi_{alloc,free} even for UP
This keeps XEN apic_ops aligned w/ x86's.

Suggested by:	kib, jhb
Reviewed by:	jhb, royger
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D5871
2016-04-07 07:00:00 +00:00
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