scsi: message: fusion: Constify struct pci_device_id

'struct pci_device_id' is not modified in these drivers.

Constifying this structure moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig, as an example:
Before:
======
text data bss dec hex filename
36999 2451 88 39538 9a72 drivers/message/fusion/mptfc.o

After:
=====
text data bss dec hex filename
37415 2043 88 39546 9a7a drivers/message/fusion/mptfc.o

Signed-off-by: Christophe JAILLET <[e-mail]>
Link: https://lore.kernel.org/r/fe8f17a999[e-mail]
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/message/fusion/mptfc.c

···
  * Supported hardware
  */
 
-static struct pci_device_id mptfc_pci_table[] = {
+static const struct pci_device_id mptfc_pci_table[] = {
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVICEID_FC909,
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVICEID_FC919,

drivers/message/fusion/mptsas.c

···
 	mptscsih_remove(pdev);
 }
 
-static struct pci_device_id mptsas_pci_table[] = {
+static const struct pci_device_id mptsas_pci_table[] = {
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_SAS1064,
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_SAS1068,

drivers/message/fusion/mptspi.c

···
  * Supported hardware
  */
 
-static struct pci_device_id mptspi_pci_table[] = {
+static const struct pci_device_id mptspi_pci_table[] = {
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_53C1030,
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ PCI_VENDOR_ID_ATTO, MPI_MANUFACTPAGE_DEVID_53C1030,