+ enable cs_opt_consts on arm as well

compiler/arm/cpuinfo.pas

@@ -1081,7 +1081,7 @@ Const
 
    level1optimizerswitches = genericlevel1optimizerswitches;
    level2optimizerswitches = genericlevel2optimizerswitches + level1optimizerswitches +
-     [{$ifndef llvm}cs_opt_regvar,{$endif}cs_opt_stackframe,cs_opt_tailrecursion,cs_opt_nodecse];
+     [{$ifndef llvm}cs_opt_regvar,{$endif}cs_opt_stackframe,cs_opt_tailrecursion,cs_opt_nodecse,cs_opt_consts];
    level3optimizerswitches = genericlevel3optimizerswitches + level2optimizerswitches + [cs_opt_scheduler];
    level4optimizerswitches = genericlevel4optimizerswitches + level3optimizerswitches + [];