scsi: lpfc: Fix oops if nvmet_fc_register_targetport fails

scsi: lpfc: Fix oops if nvmet_fc_register_targetport fails

commit e7981a2c725f8e237f749fa1358997707d57e32c upstream.

if nvmet targetport registration fails, the driver encounters a NULL
pointer oops in lpfc_hb_timeout_handler.

To fix: if registration fails, ensure nvmet_support is cleared on the
port structure.

Also enhanced the log message on failure.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>