Fix matmul AXI: add missing awlock/cache/prot ports, remove placeholder

rtl/ip/matmul/matmul_axi_slave.v

@@ -65,6 +65,9 @@ module matmul_axi_slave (
     input      [7:0]  s_axi_awlen,
     input      [2:0]  s_axi_awsize,
     input      [1:0]  s_axi_awburst,
+    input             s_axi_awlock,
+    input      [3:0]  s_axi_awcache,
+    input      [2:0]  s_axi_awprot,
     input             s_axi_awvalid,
     output reg        s_axi_awready,
 
@@ -88,6 +91,9 @@ module matmul_axi_slave (
     input      [7:0]  s_axi_arlen,
     input      [2:0]  s_axi_arsize,
     input      [1:0]  s_axi_arburst,
+    input             s_axi_arlock,
+    input      [3:0]  s_axi_arcache,
+    input      [2:0]  s_axi_arprot,
     input             s_axi_arvalid,
     output reg        s_axi_arready,