SEGEV defines

[Bradley Bozarth <bbozarth@cisco.com>]

Can these be changed?

> Now a question, why does mips use these values:                               
>  #define SIGEV_SIGNAL   129     /* notify via signal */                       
>  #define SIGEV_CALLBACK 130     /* ??? */                                     
>  #define SIGEV_THREAD   131     /* deliver via thread                         
> creation */                                                                   
>                                                                               
> It is the only platform that adds anything to the simple                      
> 1,2,3 values used on other platforms.  The reason I ask, is                   
> that I would like to change them to conform to all the                        
> others.