crypto: fix typo in Kconfig help text

Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 81c185a..755ab90 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -816,8 +816,8 @@
 	help
 	  This option enables the generic pseudo random number generator
 	  for cryptographic modules.  Uses the Algorithm specified in
-	  ANSI X9.31 A.2.4. Not this option must be enabled if CRYPTO_FIPS 
-	  is selected
+	  ANSI X9.31 A.2.4. Note that this option must be enabled if
+	  CRYPTO_FIPS is selected
 
 source "drivers/crypto/Kconfig"