[cheshire] Don't compile the dummy first-pass-decoder in CVA6

cheshire/Makefile

@@ -25,7 +25,7 @@ ARA_CONFIGURATION         ?= 2_lanes
 include $(ARA_ROOT)/config/$(ARA_CONFIGURATION).mk
 BOARD                     ?= vcu128
 VLOG_ARGS                 ?= -suppress 2583 -suppress 13314
-COMMON_CUSTOM_TARGETS     := -t cv64a6_imafdcv_sv39 -t cva6 --define ARA --define NR_LANES=$(nr_lanes) --define VLEN=$(vlen)
+COMMON_CUSTOM_TARGETS     := -t cv64a6_imafdcv_sv39 -t cva6 -t exclude_first_pass_decoder --define ARA --define NR_LANES=$(nr_lanes) --define VLEN=$(vlen)
 CUSTOM_SIM_BENDER_TARGETS := $(COMMON_CUSTOM_TARGETS) -t sim -t test -t rtl --vlog-arg="$(VLOG_ARGS)"
 CUSTOM_XIL_BENDER_TARGETS := $(COMMON_CUSTOM_TARGETS) -t fpga -t $(BOARD)