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/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index 5fa4234..92a7e60 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -10,6 +10,7 @@
  */
 
 #include <common.h>
+#include <display_options.h>
 #include <env.h>
 #include <init.h>
 #include <net.h>