Fix an issue where a FreeBSD virtual machine provisioned in
the Microsoft Azure service does not recognize the second
attached disk on the system.

Submitted by:	kyliel@Microsoft
Patched by:	weh@Microsoft
PR:		194376
MFC after:	3 days
X-MFC-10.1:	yes, ASAP
Sponsored by:	The FreeBSD Foundation


git-svn-id: svn+ssh://svn.freebsd.org/base/head@273402 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f