modprobe-small: improve config help text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

modutils/Config.src

@@ -10,7 +10,10 @@ config MODPROBE_SMALL
 	default y
 	select PLATFORM_LINUX
 	help
-	  Simplified modutils.
+	  Build smaller (~1.5 kbytes), simplified module tools.
+
+	  This option by itself does not enable any applets -
+	  you need to select applets individually below.
 
 	  With this option modprobe does not require modules.dep file
 	  and does not use /etc/modules.conf file.
@@ -31,11 +34,6 @@ config MODPROBE_SMALL
 	  Additional module parameters can be stored in
 	  /etc/modules/$module_name files.
 
-	  Apart from modprobe, other utilities are also provided:
-	  - insmod is an alias to modprobe
-	  - rmmod is an alias to modprobe -r
-	  - depmod generates modules.dep.bb
-
 INSERT
 
 comment "Options common to multiple modutils"