+ RiscV64: apply OptPass1OP also to addiw

compiler/riscv/aoptcpurv.pas

@@ -622,6 +622,9 @@ implementation
               A_LD,
 {$endif riscv64}
               A_ADD,
+{$ifdef riscv64}
+              A_ADDIW,
+{$endif riscv64}
               A_DIV,
               A_DIVU,
 {$ifdef riscv64}

compiler/riscv/nrvset.pas

@@ -58,7 +58,7 @@ implementation
 
     procedure trvcasenode.optimizevalues(var max_linear_list : int64; var max_dist : qword);
       begin
-        max_linear_list := 3;
+        max_linear_list:=3;
       end;