[new uImage] Pull in libfdt if CONFIG_FIT is enabled

New uImage format (Flattened Image Tree) requires libfdt
functionality, print out error message if CONFIG_OF_LIBFDT
is not defined.

New uImage support is enabled by defining CONFIG_FIT (and CONFIG_OF_LIBFDT).
This commit turns it on by default.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>

cpu/mpc5xxx/cpu.c

@@ -114,7 +114,7 @@ unsigned long get_tbclk (void)
 
 /* ------------------------------------------------------------------------- */
 
-#ifdef CONFIG_OF_LIBFDT
+#if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
 void ft_cpu_setup(void *blob, bd_t *bd)
 {
 	int div = in_8((void*)CFG_MBAR + 0x204) & 0x0020 ? 8 : 4;

cpu/mpc8260/cpu.c

@@ -300,7 +300,7 @@ void watchdog_reset (void)
 #endif /* CONFIG_WATCHDOG */
 
 /* ------------------------------------------------------------------------- */
-#if defined(CONFIG_OF_LIBFDT)
+#if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
 void ft_cpu_setup (void *blob, bd_t *bd)
 {
 	char * cpu_path = "/cpus/" OF_CPU;

cpu/mpc8xx/cpu.c

@@ -638,7 +638,7 @@ void reset_8xx_watchdog (volatile immap_t * immr)
 #endif /* CONFIG_WATCHDOG */
 
 /* ------------------------------------------------------------------------- */
-#if defined(CONFIG_OF_LIBFDT)
+#if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
 void ft_cpu_setup (void *blob, bd_t *bd)
 {
 	char * cpu_path = "/cpus/" OF_CPU;

include/image.h

@@ -35,10 +35,19 @@
 
 #include <asm/byteorder.h>
 #include <command.h>
+
 #ifndef USE_HOSTCC
 #include <linux/string.h>
 #include <asm/u-boot.h>
+
+/* new uImage format support enabled by default */
+#define CONFIG_FIT		1
+#define CONFIG_OF_LIBFDT	1
+
+#if defined(CONFIG_FIT) && !defined(CONFIG_OF_LIBFDT)
+#error "CONFIG_OF_LIBFDT not enabled, required by CONFIG_FIT!"
 #endif
+#endif /* USE_HOSTCC */
 
 /*
  * Operating System Codes