Streamline resume workflow by using the same functions for enabling MSIx
interrupts as used during initialisation.  Without it the driver might
crash during resume with:

WARNING: CPU: 2 PID: 4306 at ../drivers/pci/msi.c:1303 pci_irq_get_affinity+0x3b/0x90

Link: https://lore.kernel.org/r/20200113132609.69536-1-hare@suse.deSigned-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>