eth: Update ZCU111 example design to use 32-bit MACs at 10G

Signed-off-by: Alex Forencich <alex@alexforencich.com>

src/eth/example/ZCU111/fpga/fpga_10g/config.tcl

@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: MIT
+#
+# Copyright (c) 2025 FPGA Ninja, LLC
+#
+# Authors:
+# - Alex Forencich
+#
+
+set params [dict create]
+
+# 10G MAC configuration
+dict set params CFG_LOW_LATENCY "1"
+dict set params COMBINED_MAC_PCS "1"
+dict set params MAC_DATA_W "32"
+
+# apply parameters to top-level
+set param_list {}
+dict for {name value} $params {
+    lappend param_list $name=$value
+}
+
+set_property generic $param_list [get_filesets sources_1]