ACPI: fix section mismatch in acpi_pci_root_add

Fix following warning:
WARNING: vmlinux.o(.text+0x550e85): Section mismatch in reference from the function acpi_pci_root_add() to the function .devinit.text:pci_acpi_scan_root()

acpi_pci_root_add uses a __devinit annotated function and
it looks like annotating it __devinit too is the correct fix.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/acpi/pci_root.c

@@ -184,7 +184,7 @@ static void acpi_pci_bridge_scan(struct acpi_device *device)
 		}
 }
 
-static int acpi_pci_root_add(struct acpi_device *device)
+static int __devinit acpi_pci_root_add(struct acpi_device *device)
 {
 	int result = 0;
 	struct acpi_pci_root *root = NULL;