Code style fixes

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/library/ssl_tls13_keys.c b/library/ssl_tls13_keys.c
index 714c21a..46ff3af 100644
--- a/library/ssl_tls13_keys.c
+++ b/library/ssl_tls13_keys.c
@@ -1235,7 +1235,7 @@
         return ret;
     }
 
-    key_len = PSA_BITS_TO_BYTES(key_bits);
+    key_len = PSA_BITS_TO_BYTES( key_bits );
 
     if( PSA_ALG_IS_AEAD( alg ) )
         iv_len = 12;
@@ -1469,7 +1469,7 @@
         goto cleanup;
     }
 
-    key_len = PSA_BITS_TO_BYTES(key_bits);
+    key_len = PSA_BITS_TO_BYTES( key_bits );
 
     if( PSA_ALG_IS_AEAD( alg ) )
         iv_len = 12;