Work on TRAB's auto_update feature.

Cleanup for submitted patches.
diff --git a/common/devices.c b/common/devices.c
index 7b4a1cd..bf7486a 100644
--- a/common/devices.c
+++ b/common/devices.c
@@ -159,6 +159,8 @@
 int devices_init (void)
 {
 #ifndef CONFIG_ARM     /* already relocated for current ARM implementation */
+	DECLARE_GLOBAL_DATA_PTR;
+
 	ulong relocation_offset = gd->reloc_off;
 	int i;