common: Drop image.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/liebherr/display5/display5.c b/board/liebherr/display5/display5.c
index 85ca777..a362d25 100644
--- a/board/liebherr/display5/display5.c
+++ b/board/liebherr/display5/display5.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <fdt_support.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/imx-regs.h>