Fix custom MODEL feature
Previously, the TestDriver would set MODEL to TestHarness if unset. This fixes the feature to let us set MODEL from the makefile.
@@ -50,6 +50,7 @@ PREPROC_DEFINES = \
+define+RESET_DELAY=$(RESET_DELAY) \
+define+PRINTF_COND=$(TB).printf_cond \
+define+STOP_COND=!$(TB).reset \
+ +define+MODEL=$(MODEL) \
+define+RANDOMIZE_MEM_INIT \
+define+RANDOMIZE_REG_INIT \
+define+RANDOMIZE_GARBAGE_ASSIGN \
