Specify suffix added to test bench data file name when generating multifile test bench
'Data posfix'
Default: '_data'.
Specify the postfix as a character vector. HDL Coder™ applies TestBenchDataPostFix only
when generating a multi-file test bench (i.e. when MultifileTestBench is 'on').
For example, if the name of your DUT is my_test,
and TestBenchPostFix has the default value _tb,
the coder adds the postfix _data to form the test
bench data file name my_test_tb_data.
To set this property, use hdlset_param or makehdl. To view the property value, use hdlget_param.