arm: Include asm/setup.h explictly

Include this header where needed so we do not need to rely on common.h.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/lego/ev3/legoev3.c b/board/lego/ev3/legoev3.c
index 3d6de11..2653439 100644
--- a/board/lego/ev3/legoev3.c
+++ b/board/lego/ev3/legoev3.c
@@ -26,6 +26,7 @@
 #include <linux/errno.h>
 #include <hwconfig.h>
 #include <asm/mach-types.h>
+#include <asm/setup.h>
 
 #ifdef CONFIG_MMC_DAVINCI
 #include <mmc.h>