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/common/board_r.c b/common/board_r.c
index e702f02..56eb60f 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -13,6 +13,7 @@
 #include <api.h>
 #include <bootstage.h>
 #include <cpu_func.h>
+#include <display_options.h>
 #include <exports.h>
 #ifdef CONFIG_MTD_NOR_FLASH
 #include <flash.h>