style: Set the property restrictions flags from the centralized list.

Differential Revision: https://phabricator.services.mozilla.com/D37721

components/style/properties/longhands/padding.mako.rs

@@ -21,7 +21,7 @@
         logical=side[1],
         logical_group="padding",
         spec=spec,
-        flags="APPLIES_TO_FIRST_LETTER GETCS_NEEDS_LAYOUT_FLUSH",
+        flags="GETCS_NEEDS_LAYOUT_FLUSH",
         allow_quirks="No" if side[1] else "Yes",
         servo_restyle_damage="reflow rebuild_and_reflow_inline"
     )}