Kconfig: Fix SPL_LOAD_FIT description

Both the SPL_LOAD_FIT and SPL_LOAD_FIT_FULL have the same description.
Adjust the description to make it clear which one is which.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@konsulko.com>
diff --git a/Kconfig b/Kconfig
index 301ebf8..a021686 100644
--- a/Kconfig
+++ b/Kconfig
@@ -389,7 +389,7 @@
 	select SPL_RSA
 
 config SPL_LOAD_FIT
-	bool "Enable SPL loading U-Boot as a FIT"
+	bool "Enable SPL loading U-Boot as a FIT (basic fitImage features)"
 	select SPL_FIT
 	help
 	  Normally with the SPL framework a legacy image is generated as part
@@ -400,7 +400,7 @@
 	  and passing the correct one to U-Boot.
 
 config SPL_LOAD_FIT_FULL
-	bool "Enable SPL loading U-Boot as a FIT"
+	bool "Enable SPL loading U-Boot as a FIT (full fitImage features)"
 	select SPL_FIT
 	help
 	  Normally with the SPL framework a legacy image is generated as part