Hi,

This patch makes scheduler files to be predicated on INSN_SCHEDULING, 
which fixes bootstrap-time warnings on targets without scheduling support.

I suspect fine-grain use of INSN_SCHEDULING was provoked by some 
historical reasons, but at current point I don't see any justification 
for that.

The patch was bootstrapped both on targets that don't have scheduling 
(m68k) and on those which do (x86_64, ia64 and ppc64).

OK for trunk?

:ADDPATCH scheduler:


Thanks,

Maxim