scsi: lpfc: Fix lpfc_cpumask_of_node_init()

Fix the following kernel warning:

cpumask_of_node(-1): (unsigned)node >= nr_node_ids(1)

Fixes: dcaa2136 ("scsi: lpfc: Change default IRQ model on AMD architectures")
Link: https://lore.kernel.org/r/20191108225947.1395-1-jsmart2021@gmail.com


Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>