ACPI: minor printk format change in acpi_pad

Minor format change.

Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 474be3a..a43fa1a 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -456,7 +456,7 @@
 			dev_name(&device->dev), event, 0);
 		break;
 	default:
-		printk(KERN_WARNING"Unsupported event [0x%x]\n", event);
+		printk(KERN_WARNING "Unsupported event [0x%x]\n", event);
 		break;
 	}
 }