special include/asm/siginfo.h for MIPS

[Jun Sun <jsun@mvista.com>]

MIPS has different values from all other arches in this file.
(such as SIGEV_NONE, etc)  Does anybody know why?

Because of this in 2.5 everybody else now goes to use the 
the generic version of siginfo, while MIPS uses its own special
version.

Even worse the new usage of SIGEV_XXX seems to suggest
sigev_notify is bitwise-or'ed flag instead of enumeration of integers.
This is in a direct conflict with current MIPS values.

Any thoughts?  Can we just use what other arches are using?

Jun