image: Use Kconfig to enable CONFIG_FIT_VERBOSE on host

Add a host Kconfig for FIT_VERBOSE. With this we can use
CONFIG_IS_ENABLED(FIT_VERBOSE) directly in the tools build, so drop the
forcing of this in the image.h header.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

tools/Kconfig

@@ -45,6 +45,11 @@ config TOOLS_FIT_SIGNATURE_MAX_SIZE
 	depends on TOOLS_FIT_SIGNATURE
 	default 0x10000000
 
+config TOOLS_FIT_VERBOSE
+	def_bool y
+	help
+	  Support verbose FIT output in the tools builds
+
 config TOOLS_MD5
 	def_bool y
 	help