When vget() fails (because the vnode has been reclaimed), there is no sense to loop trying to vget() the vnode again.
When vget() fails (because the vnode has been reclaimed), there is no
sense to loop trying to vget() the vnode again.

PR:	122977
Submitted by:	Arthur Hartwig <arthur.hartwig nokia com>
Tested by:	pho
Reviewed by:	jhb
MFC after:	1 week

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