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/arch/x86/lib/tpl.c b/arch/x86/lib/tpl.c
index 34804b5..f9dcf32 100644
--- a/arch/x86/lib/tpl.c
+++ b/arch/x86/lib/tpl.c
@@ -7,6 +7,7 @@
 #include <debug_uart.h>
 #include <dm.h>
 #include <hang.h>
+#include <image.h>
 #include <spl.h>
 #include <asm/cpu.h>
 #include <asm/mtrr.h>