[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

[Ralph Giles]

I wrote:

> In a floating point build
> it's enabled only at complexity setting 10

Sorry. I meant that in a _fixed_point_ build the new analysis code is
enabled only at complexity setting 10. It's currently enabled for
floating point builds at complexity 7 or higher. Both fixed and float
builds default to complexity 9 in 1.1.

 -r