eth: Add GBX_CNT to taxi_xgmii_baser_enc_64 testbench

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

src/eth/tb/taxi_xgmii_baser_enc_64/Makefile

@@ -35,6 +35,7 @@ export PARAM_DATA_W := 64
 export PARAM_CTRL_W := $(shell expr $(PARAM_DATA_W) / 8 )
 export PARAM_HDR_W := 2
 export PARAM_GBX_IF_EN := 0
+export PARAM_GBX_CNT := 1
 
 ifeq ($(SIM), icarus)
 	PLUSARGS += -fst

src/eth/tb/taxi_xgmii_baser_enc_64/test_taxi_xgmii_baser_enc_64.py

@@ -231,6 +231,7 @@ def test_taxi_xgmii_baser_enc_64(request):
     parameters['CTRL_W'] = parameters['DATA_W'] // 8
     parameters['HDR_W'] = 2
     parameters['GBX_IF_EN'] = 0
+    parameters['GBX_CNT'] = 1
 
     extra_env = {f'PARAM_{k}': str(v) for k, v in parameters.items()}