Separate gm2.sv to be separate module

src/ieu/aes_common/galoismult_forward.sv

@@ -33,13 +33,3 @@ module galoismult_forward(input  logic [7:0] in, output logic [7:0] out);
    assign out = in[7] ? (leftshift ^ 8'b00011011) : leftshift;
 
 endmodule
-
-module gm2 (gm2_In, gm2_Out); 
-   
-   input logic [7:0]  gm2_In;
-   output logic [7:0] gm2_Out;
-   
-   // Set output to Galois Mult 2
-   assign gm2_Out = {gm2_In[6:0], 1'b0} ^ (8'h1b & {8{gm2_In[7]}});
-   
-endmodule 

src/ieu/aes_common/gm2.sv

@@ -0,0 +1,36 @@
+///////////////////////////////////////////
+// gm2.sv
+//
+// Written: ryan.swann@okstate.edu, james.stine@okstate.edu, David_Harris@hmc.edu
+// Created: 20 February 2024
+//
+// Purpose: Galois field operations for mix columns operation
+//
+// A component of the CORE-V-WALLY configurable RISC-V project.
+// https://github.com/openhwgroup/cvw
+// 
+// Copyright (C) 2021-24 Harvey Mudd College & Oklahoma State University
+//
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+//
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
+//
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work distributed under the 
+// License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 
+// either express or implied. See the License for the specific language governing permissions 
+// and limitations under the License.
+////////////////////////////////////////////////////////////////////////////////////////////////
+
+module gm2 (gm2_In, gm2_Out); 
+   
+   input logic [7:0]  gm2_In;
+   output logic [7:0] gm2_Out;
+   
+   // Set output to Galois Mult 2
+   assign gm2_Out = {gm2_In[6:0], 1'b0} ^ (8'h1b & {8{gm2_In[7]}});
+   
+endmodule