rename arguments to simple names instead of - keyword

The reason for renaming is because, the tcl infra of Vivado is not allowing proc arguments to have "-" symbol, it is treating it as a switch as erroring out as below

xilinx::incrcompile::get_reused -cells
ERROR: [Common 17-170] Unknown option '-cells', please type 'xilinx::incrcompile::get_reused -help' for usage info.