10080 smatch Makefile changes for usr/src/cmd

*** 10,25 ****
--- 10,29 ----
  #
  
  #
  # Copyright (c) 2018 by Chelsio Communications, Inc.
  #
+ # Copyright (c) 2018, Joyent, Inc.
+ 
  PROG =  cxgbetool
  
  include ../Makefile.cmd
  
  CFLAGS += $(CCVERBOSE) -I$(SRC)/uts/common/io/cxgbe/t4nex -I$(SRC)/uts/common/io/cxgbe/firmware
  
+ SMOFF += all_func_returns
+ 
  all: $(PROG)
  
  install: all $(ROOTUSRSBINPROG)
  
  clean: