scsi: mpt3sas: Fix an issue when driver is being removed

Warnings may be logged during driver removal:

mpt3sas 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT ..,

Fix this by deallocating DMA memory later.
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Link: https://lore.kernel.org/r/20230403184736.6399-1-thenzl@redhat.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_scsih.c

@@ -12929,10 +12929,10 @@ _mpt3sas_exit(void)
 	pr_info("mpt3sas version %s unloading\n",
 				MPT3SAS_DRIVER_VERSION);
 
-	mpt3sas_ctl_exit(hbas_to_enumerate);
-
 	pci_unregister_driver(&mpt3sas_driver);
 
+	mpt3sas_ctl_exit(hbas_to_enumerate);
+
 	scsih_exit();
 }