st,i965: Stop looping on 64-bit lowering

Now that the 64-bit lowering passes do a complete lowering in one go, we
don't need to loop anymore.  We do, however, have to ensure that int64
lowering happens after double lowering because double lowering can
produce int64 ops.

Reviewed-by: Eric Anholt <eric@anholt.net>
3 files changed