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>

boot/image-board.c

@@ -11,6 +11,7 @@
 #include <common.h>
 #include <bootstage.h>
 #include <cpu_func.h>
+#include <display_options.h>
 #include <env.h>
 #include <fpga.h>
 #include <image.h>

boot/image.c

@@ -9,6 +9,7 @@
 #ifndef USE_HOSTCC
 #include <common.h>
 #include <env.h>
+#include <display_options.h>
 #include <init.h>
 #include <lmb.h>
 #include <log.h>