rbcodec refactoring: dsp_set_eq_coefs

dsp_set_eq_coefs now has parameters for the band settings, so it doesn't
need to access global_settings.

Change-Id: I29ac19fc353b15a79cb25f0e45132aef0881e4c9
Reviewed-on: http://gerrit.rockbox.org/138
Reviewed-by: Nils Wallménius <nils@rockbox.org>
4 files changed