scsi: megaraid_sas: fixup MSIx interrupt setup during resume

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.de


Signed-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>