4623 Remove -Wno-unused-label from mpt_sas

*** 60,70 ****
  #
  include $(UTSBASE)/intel/Makefile.intel
  
  CERRWARN        += -_gcc=-Wno-parentheses
  CERRWARN        += -_gcc=-Wno-uninitialized
- CERRWARN        += -_gcc=-Wno-unused-label
  CERRWARN        += -_gcc=-Wno-switch
  
  #
  #       Default build targets.
  #
--- 60,69 ----