Kconfig: Move CONFIG_FIT and related options to Kconfig

There are already two FIT options in Kconfig but the CONFIG options are
still in the header files. We need to do a proper move to fix this.

Move these options to Kconfig and tidy up board configuration:

   CONFIG_FIT
   CONFIG_OF_BOARD_SETUP
   CONFIG_OF_SYSTEM_SETUP
   CONFIG_FIT_SIGNATURE
   CONFIG_FIT_BEST_MATCH
   CONFIG_FIT_VERBOSE
   CONFIG_OF_STDOUT_VIA_ALIAS
   CONFIG_RSA

Unfortunately the first one is a little complicated. We need to make sure
this option is not enabled in SPL by this change. Also this option is
enabled automatically in the host builds by defining CONFIG_FIT in the
image.h file. To solve this, add a new IMAGE_USE_FIT #define which can
be used in files that are built on the host but must also build for U-Boot
and SPL.

Note: Masahiro's moveconfig.py script is amazing.

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Add microblaze change, various configs/ re-applies]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/common/bootm.c b/common/bootm.c
index df27089..ff56681 100644
--- a/common/bootm.c
+++ b/common/bootm.c
@@ -108,7 +108,7 @@
 		images.os.arch = image_get_arch(os_hdr);
 		break;
 #endif
-#if defined(CONFIG_FIT)
+#if IMAGE_ENABLE_FIT
 	case IMAGE_FORMAT_FIT:
 		if (fit_image_get_type(images.fit_hdr_os,
 				       images.fit_noffset_os,
@@ -180,7 +180,7 @@
 		/* Kernel entry point is the setup.bin */
 	} else if (images.legacy_hdr_valid) {
 		images.ep = image_get_ep(&images.legacy_hdr_os_copy);
-#if defined(CONFIG_FIT)
+#if IMAGE_ENABLE_FIT
 	} else if (images.fit_uname_os) {
 		int ret;
 
@@ -245,7 +245,7 @@
 	set_working_fdt_addr((ulong)images.ft_addr);
 #endif
 
-#if defined(CONFIG_FIT)
+#if IMAGE_ENABLE_FIT
 	/* find all of the loadables */
 	ret = boot_get_loadable(argc, argv, &images, IH_ARCH_DEFAULT,
 			       NULL, NULL);
@@ -788,7 +788,7 @@
 	const void *buf;
 	const char	*fit_uname_config = NULL;
 	const char	*fit_uname_kernel = NULL;
-#if defined(CONFIG_FIT)
+#if IMAGE_ENABLE_FIT
 	int		os_noffset;
 #endif
 
@@ -849,7 +849,7 @@
 		bootstage_mark(BOOTSTAGE_ID_DECOMP_IMAGE);
 		break;
 #endif
-#if defined(CONFIG_FIT)
+#if IMAGE_ENABLE_FIT
 	case IMAGE_FORMAT_FIT:
 		os_noffset = fit_image_load(images, img_addr,
 				&fit_uname_kernel, &fit_uname_config,