ibmvnic: fix kdump over nfs when auto priority disabled for ibmvnic
Bugzilla: http://bugzilla.redhat.com/2020021
Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=41987945
Tested: ltcden4-lp12 successfully nfs dumped to ltcden7-lp7
Signed-off-by: Diego Domingos didoming@redhat.com