This makes it possible to select CONFIG_CRYPTO_LIB_ARC4 directly. We 
need this to be able to compile this into the kernel and make use of it 
from backports.

--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -20,7 +20,7 @@ config CRYPTO_LIB_AESGCM
 	select CRYPTO_LIB_UTILS
 
 config CRYPTO_LIB_ARC4
-	tristate
+	tristate "ARC4 cipher library"
 
 config CRYPTO_LIB_GF128MUL
 	tristate