common: Drop display_options.h from common header

Move this out of the common header and include it only where needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/freescale/lx2160a/lx2160a.c b/board/freescale/lx2160a/lx2160a.c
index a078643..5f0cc9e 100644
--- a/board/freescale/lx2160a/lx2160a.c
+++ b/board/freescale/lx2160a/lx2160a.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <clock_legacy.h>
+#include <display_options.h>
 #include <dm.h>
 #include <init.h>
 #include <asm/global_data.h>