[GHC] #8789: includes/stg/SMP.h: use 'NOSMP' instead of never defined 'WITHSMP'

[GHC]

#8789: includes/stg/SMP.h: use 'NOSMP' instead of never defined 'WITHSMP'
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       Reporter:  slyfox            |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler          |           Version:  7.6.3
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 Looks like WITHSMP is not generated anywere,
 thus don't know how it worked before.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8789>
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