[Differential] D9904: fix UEFI boot on physical machines

[sepherosa_gmail.com (Sepherosa Ziehau)]

sepherosa_gmail.com accepted this revision.
This revision has a positive review.

REVISION DETAIL
  https://reviews.freebsd.org/D9904

EMAIL PREFERENCES
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To: decui_microsoft.com, imp, jhb, will, kib, delphij, emaste, marcel, honzhan_microsoft.com, howard0su_gmail.com, tsoome, gonzo, manu, andrew, sbruno, ambrisko, allanjude, bapt, cem, smh, ian, sepherosa_gmail.com
Cc: freebsd-virtualization-list