fpga: x400: Remove CPU_W parameter

Removes the CPU_W parameter from x4xx.v and the qsfp_wrapper files. The
value of this parameter depends on the axi_eth_dma IP and therefore
should not be changed.


Original-commit: 84c49f40adc980e2968a6a844b4bdbb2d2d38c9c

top/x400/x4xx_qsfp_wrapper.sv

@@ -14,7 +14,6 @@
 //
 //   PROTOCOL       : Indicates the protocol to use for each of the 4 QSFP
 //                    lanes. See x4xx_mgt_types.vh for possible values.
-//   CPU_W          : Width of CPU interface
 //   CHDR_W         : CHDR bus width
 //   NET_CHDR_W     : CHDR width used over the network connection
 //   BYTE_MTU       : Transport MTU in bytes
@@ -32,7 +31,6 @@ module x4xx_qsfp_wrapper #(
                                       `MGT_Disabled,
                                       `MGT_Disabled,
                                       `MGT_Disabled},
-  parameter         CPU_W          = 64,
   parameter         CHDR_W         = 64,
   parameter         NET_CHDR_W     = CHDR_W,
   parameter         BYTE_MTU       = $clog2(8*1024),
@@ -85,6 +83,7 @@ module x4xx_qsfp_wrapper #(
 
   localparam REG_BASE_SFP_IO      = 14'h0;
   localparam REG_BASE_ETH_SWITCH  = 14'h1000;
+  localparam CPU_W                = 64;     // Must match axi_eth_dma IP
   localparam CPU_USER_W           = $clog2(CPU_W/8)+1;
   localparam CHDR_USER_W          = $clog2(CHDR_W/8);
   localparam REG_DWIDTH           = 32;