be: Remove the thin wrapper macro arch_register_class_flags().

ir/be/bearch.h

@@ -239,9 +239,6 @@ struct arch_register_class_t {
 /** return the number of registers in this register class */
 #define arch_register_class_n_regs(cls) ((cls)->n_regs)
 
-/** return the register class flags */
-#define arch_register_class_flags(cls) ((cls)->flags)
-
 static inline const arch_register_t *arch_register_for_index(
 		const arch_register_class_t *cls, unsigned idx)
 {

ir/be/bechordal_main.c

@@ -284,7 +284,7 @@ static void be_ra_chordal_main(ir_graph *irg)
 	const arch_env_t *arch_env = be_get_irg_arch_env(irg);
 	for (int j = 0, m = arch_env->n_register_classes; j < m; ++j) {
 		const arch_register_class_t *cls = &arch_env->register_classes[j];
-		if (arch_register_class_flags(cls) & arch_register_class_flag_manual_ra)
+		if (cls->flags & arch_register_class_flag_manual_ra)
 			continue;
 
 		stat_ev_ctx_push_str("bechordal_cls", cls->name);

ir/be/beprefalloc.c

@@ -1823,7 +1823,7 @@ static void be_pref_alloc(ir_graph *new_irg)
 	int               n_cls    = arch_env->n_register_classes;
 	for (int c = 0; c < n_cls; ++c) {
 		cls = &arch_env->register_classes[c];
-		if (arch_register_class_flags(cls) & arch_register_class_flag_manual_ra)
+		if (cls->flags & arch_register_class_flag_manual_ra)
 			continue;
 
 		stat_ev_ctx_push_str("regcls", cls->name);