Reduce sd_controller addr width from 4 to 3

hw/fpga/hvl/sd_cmd_testbench.sv

@@ -8,7 +8,7 @@ logic clk;
 logic clk_50;
 logic rst;
 
-logic [3:0] addr;
+logic [2:0] addr;
 logic [7:0] data;
 logic cs;