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>

README

@@ -3093,20 +3093,6 @@ CBFS (Coreboot Filesystem) support
 		will set it back to normal.  This command currently
 		supports i.MX53 and i.MX6.
 
-- Signing support:
-		CONFIG_RSA
-
-		This enables the RSA algorithm used for FIT image verification
-		in U-Boot. See doc/uImage.FIT/signature.txt for more information.
-
-		The Modular Exponentiation algorithm in RSA is implemented using
-		driver model. So CONFIG_DM needs to be enabled by default for this
-		library to function.
-
-		The signing part is build into mkimage regardless of this
-		option. The software based modular exponentiation is built into
-		mkimage irrespective of this option.
-
 - bootcount support:
 		CONFIG_BOOTCOUNT_LIMIT
 
@@ -3306,33 +3292,14 @@ FIT uImage format:
 		enabled per default for backward compatibility.
 
 - FIT image support:
-		CONFIG_FIT
-		Enable support for the FIT uImage format.
-
-		CONFIG_FIT_BEST_MATCH
-		When no configuration is explicitly selected, default to the
-		one whose fdt's compatibility field best matches that of
-		U-Boot itself. A match is considered "best" if it matches the
-		most specific compatibility entry of U-Boot's fdt's root node.
-		The order of entries in the configuration's fdt is ignored.
-
-		CONFIG_FIT_SIGNATURE
-		This option enables signature verification of FIT uImages,
-		using a hash signed and verified using RSA. If
-		CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
-		hashing is available using hardware, RSA library will use it.
-		See doc/uImage.FIT/signature.txt for more details.
-
-		WARNING: When relying on signed FIT images with required
-		signature check the legacy image format is default
-		disabled. If a board need legacy image format support
-		enable this through CONFIG_IMAGE_FORMAT_LEGACY
-
 		CONFIG_FIT_DISABLE_SHA256
 		Supporting SHA256 hashes has quite an impact on binary size.
 		For constrained systems sha256 hash support can be disabled
 		with this option.
 
+		TODO(sjg@chromium.org): Adjust this option to be positive,
+		and move it to Kconfig
+
 - Standalone program support:
 		CONFIG_STANDALONE_LOAD_ADDR