Revert of a change introduced by Bug#47974

"TYPE=storage_engine" is deprecated, and will be removed
in the Celosia release of MySQL.  Since the option is
present in the Betony release and the version number of
Celosia is still not decided, we need to bump the
deprecation version number back up to "6.0".

sql/sql_yacc.yy

@@ -4596,7 +4596,7 @@ create_table_option:
         | TYPE_SYM opt_equal storage_engines
           {
             Lex->create_info.db_type= $3;
-            WARN_DEPRECATED(yythd, "5.4.4", "TYPE=storage_engine",
+            WARN_DEPRECATED(yythd, "6.0", "TYPE=storage_engine",
                             "'ENGINE=storage_engine'");
             Lex->create_info.used_fields|= HA_CREATE_USED_ENGINE;
           }