x86: constify PCI raw ops structures

As with any other such change, the goal is to prevent inadvertent
writes to these structures (assuming DEBUG_RODATA is enabled), and to
separate data (possibly frequently) written to from such never getting
modified.

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/arch/x86/pci/pcbios.c b/arch/x86/pci/pcbios.c
index f685535..db0e9a5 100644
--- a/arch/x86/pci/pcbios.c
+++ b/arch/x86/pci/pcbios.c
@@ -303,7 +303,7 @@
  * Function table for BIOS32 access
  */
 
-static struct pci_raw_ops pci_bios_access = {
+static const struct pci_raw_ops pci_bios_access = {
 	.read =		pci_bios_read,
 	.write =	pci_bios_write
 };
@@ -312,7 +312,7 @@
  * Try to find PCI BIOS.
  */
 
-static struct pci_raw_ops * __devinit pci_find_bios(void)
+static const struct pci_raw_ops * __devinit pci_find_bios(void)
 {
 	union bios32 *check;
 	unsigned char sum;