m68k: refactor - use the new CPUM68K_HAS_TSTAREG capability where applicable

compiler/m68k/n68kadd.pas

@@ -525,7 +525,7 @@ implementation
            else
              begin
                hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,left.resultdef,true);
-               if (current_settings.cputype = cpu_mc68000) and isaddressregister(left.location.register) then
+               if (not (CPUM68K_HAS_TSTAREG in cpu_capabilities[current_settings.cputype])) and isaddressregister(left.location.register) then
                  begin
                    tmpreg:=cg.getintregister(current_asmdata.CurrAsmList,cmpsize);
                    cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,cmpsize,left.location.register,tmpreg);

compiler/m68k/n68kcnv.pas

@@ -276,7 +276,7 @@ implementation
                   end
                 else
                   begin
-                    if (current_settings.cputype = cpu_mc68000) and isaddressregister(left.location.register) then
+                    if (not (CPUM68K_HAS_TSTAREG in cpu_capabilities[current_settings.cputype])) and isaddressregister(left.location.register) then
                       begin
                         hreg2:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
                         cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,opsize,left.location.register,hreg2);

compiler/m68k/n68kmat.pas

@@ -121,7 +121,7 @@ implementation
                   else
                     begin
                       hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,resultdef,true);
-                      if (current_settings.cputype = cpu_mc68000) and isaddressregister(left.location.register) then
+                      if (not (CPUM68K_HAS_TSTAREG in cpu_capabilities[current_settings.cputype])) and isaddressregister(left.location.register) then
                         begin
                           hreg:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
                           cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,opsize,left.location.register,hreg);