Separated manager and subordinate drivers

Other clean up and changes

tb/tb_seq_base.sv

@@ -42,10 +42,12 @@ class axi_simple_seq extends axi_m_seq_base;
 
         `uvm_info("axi_simple_seq", "Starting simple AXI sequence", UVM_LOW)
 
-        `uvm_do(txn, env.get_axi_m_sequencer(), -1, {
-            addr == 32'h0000_0000; // Example address
-            data == 32'hDEAD_BEEF; // Example data
-            strb == 'hf; // Example byte enable
-        });
+        repeat(10) begin
+            `uvm_do(txn, env.get_axi_m_sequencer(), -1, {
+                addr != {`ADDR_WIDTH{1'b0}};
+                data != {`DATA_WIDTH{1'b0}};
+                strb == 'hf; // Example byte enable
+            });
+        end
     endtask
 endclass : axi_simple_seq