Sticking the not-implemented syscall stuff in sys.c is a pain because the
cond_syscall()s explode when certain prototypes are in scope.  And we need
those prototypes' header files for the C code in sys.c.

Fix all that up by moving all the sys_ni_syscall code into its own .c file.
Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>