common: Move the image globals into image.h

These three globals relate to image handling. Move them to the image
header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/common.h b/include/common.h
index 09b5f62..5e38c5f 100644
--- a/include/common.h
+++ b/include/common.h
@@ -62,10 +62,6 @@
 /* common/cmd_source.c */
 int	source (ulong addr, const char *fit_uname);
 
-extern ulong image_load_addr;		/* Default Load Address */
-extern ulong image_save_addr;		/* Default Save Address */
-extern ulong image_save_size;		/* Default Save Size */
-
 /* common/memsize.c */
 long	get_ram_size  (long *, long);
 phys_size_t get_effective_memsize(void);
diff --git a/include/image.h b/include/image.h
index 86ebaae..3649644 100644
--- a/include/image.h
+++ b/include/image.h
@@ -112,6 +112,10 @@
 # define IMAGE_OF_SYSTEM_SETUP	0
 #endif
 
+extern ulong image_load_addr;		/* Default Load Address */
+extern ulong image_save_addr;		/* Default Save Address */
+extern ulong image_save_size;		/* Default Save Size */
+
 enum ih_category {
 	IH_ARCH,
 	IH_COMP,