Fix spelling of 'features' in comment

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/configs/config-no-entropy.h b/configs/config-no-entropy.h
index 04c1213..63f9411 100644
--- a/configs/config-no-entropy.h
+++ b/configs/config-no-entropy.h
@@ -21,7 +21,7 @@
  */
 /*
  * Minimal configuration of features that do not require an entropy source
- * Distinguishing reatures:
+ * Distinguishing features:
  * - no entropy module
  * - no TLS protocol implementation available due to absence of an entropy
  *   source