ACPI: bay: make drive_bays static

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/bay.c b/drivers/acpi/bay.c
index 3f0ae7d..aa1b131 100644
--- a/drivers/acpi/bay.c
+++ b/drivers/acpi/bay.c
@@ -69,7 +69,7 @@
 	struct platform_device *pdev;
 };
 
-LIST_HEAD(drive_bays);
+static LIST_HEAD(drive_bays);
 
 
 /*****************************************************************************