ARM: Enable scheduling for Thumb-2

[Ramana Radhakrishnan]

On Tue, 2009-11-10 at 16:11 -0500, Daniel Jacobowitz wrote:
> I came across this ??? comment... in my testing, enabling scheduling
> for Thumb-2 is size-neutral and has performance benefits ranging from
> 1% to 20%.  A couple of performance tests regress, but they are
> reasonable problems with non-clairvoyant register allocation
> (something was spilled because scheduling increased lifetimes).
> 

This broke CSiBe builds for -Os and Thumb2 - I've filed
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42031

for this. Could you take a look at this ? 

Cheers
Ramana